Running Gait & Biomechanics Hub
How you move when you run -- your gait -- decides which shoes suit you and where injuries come from. This hub explains pronation, the gait cycle, foot strike, the numbers a gait analysis measures, and what good running form looks like, all in plain English.
Pronation
Running Pronation
What is pronation?
Pronation is the way your foot rolls inward and flattens slightly as it takes your weight during each stride. It is a normal, healthy movement that lets the arch and ankle absorb shock and adapt to the ground. Almost everyone pronates to some degree, and it is part of how the foot works.
Why it matters
Pronation matters because it controls how impact forces travel up through the foot, ankle and leg. The right amount helps cushion the landing and prepare the foot to push off. Problems are usually linked to too much roll (overpronation) or too little (supination), rather than pronation itself.
How it is assessed
Pronation is judged by watching the ankle and arch during a run, often on a treadmill, or by looking at the wear pattern on an old pair of shoes. Even wear across the forefoot usually suggests a neutral roll, while heavy wear on the inner edge can point to overpronation.
What to look for
Most runners do not need to think about pronation at all unless they have recurring discomfort. If you do, a gait check can show whether your roll is neutral, excessive or limited, which helps guide shoe choice between neutral and stability models.
Common questions
What is pronation in running?
It is the natural inward roll of the foot and ankle as it lands and takes your weight, which helps absorb impact.
Is pronation bad?
No. A normal amount of pronation is healthy and necessary. Only excessive or very limited roll tends to cause issues.
How do I know how much I pronate?
A gait analysis on a treadmill, or the wear pattern on an old pair of running shoes, gives a good indication.
Does pronation decide my shoe?
It is one factor. Neutral runners suit neutral shoes; heavy overpronators sometimes prefer stability shoes.
Can pronation change over time?
Yes, it can shift with strength, mileage, body weight and footwear, so it is worth rechecking occasionally.
Overpronation
What is overpronation?
Overpronation describes a foot that rolls inward more than the typical amount as it takes load. The arch flattens further, the ankle tilts inward, and more of the push-off can come from the inner edge of the foot. It is very common, especially in runners with flatter arches.
Why it matters
For many people overpronation causes no trouble at all. For others it is associated with repeated strain because the inward roll changes how forces pass through the foot, shin and knee. Whether it needs managing depends on comfort and injury history, not the label alone.
How it is identified
It is usually spotted during a gait check or from shoe wear that is heavier on the inner edge. A simple sign is an old shoe that tilts inward when placed on a flat surface. A proper assessment looks at the whole movement, not just the foot.
What to look for
If you overpronate and run comfortably, you may not need to change anything. If you get recurring inner-leg or knee niggles, stability shoes or supportive insoles can reduce the amount of roll and even out the load.
Common questions
What is overpronation?
It is when the foot rolls inward more than average on landing, so the arch collapses further and the ankle leans inward.
Is overpronation a problem?
Not always. Many overpronators run pain-free. It only needs managing if it is linked to recurring discomfort.
What shoes are best for overpronation?
Stability or support running shoes add firmness on the inner side to limit the extra roll.
How can I tell if I overpronate?
Heavier wear on the inner edge of your shoes, or a gait analysis, will usually reveal it.
Can I fix overpronation?
Strengthening the foot and hips and choosing supportive footwear can reduce it, but some inward roll is normal.
Supination (Underpronation)
What is supination?
Supination, also known as underpronation, is when the foot does not roll inward enough and instead stays on its outer edge through the stride. Weight is carried along the outside of the foot, and push-off comes more from the smaller toes. It is the opposite pattern to overpronation.
Why it matters
Because the foot rolls less, it absorbs less shock, so more impact can travel up the leg. Supinators often suit soft, cushioned shoes that add the shock absorption the foot is not providing on its own. Like pronation, it only matters if it causes discomfort.
How it is identified
Supination shows up as wear on the outer edge of the shoe, especially the outer heel and forefoot. A gait check confirms it by showing the foot staying tilted outward rather than rolling in. High, rigid arches are often associated with it.
What to look for
If you supinate, look for neutral shoes with generous cushioning and flexibility rather than stability features. Stability shoes can make the problem worse by pushing the foot further onto its outer edge.
Common questions
What is supination in running?
It is when the foot rolls outward and stays on its outer edge instead of rolling inward to absorb impact. It is also called underpronation.
Is supination common?
It is less common than overpronation. Most runners are neutral or overpronate to some degree.
What shoes suit a supinator?
Neutral, well-cushioned and flexible shoes, not stability shoes, which can push the foot further onto its outer edge.
How do I know if I supinate?
Wear on the outer edge of your shoes and a gait analysis are the clearest signs.
Does supination cause injury?
It can be linked to recurring strain because the foot absorbs less shock, but many supinators run comfortably.
Neutral Pronation
What is neutral pronation?
Neutral pronation is when the foot rolls inward by an average, balanced amount as it lands and then pushes off from the middle of the forefoot. The arch flexes just enough to absorb shock without collapsing. It is the pattern shoe brands treat as the baseline.
Why it matters
Neutral pronation matters mostly because it gives you the most flexibility when choosing shoes. The foot is managing impact well on its own, so you do not need stability features or maximal cushioning unless you simply prefer them. It is a sign the foot and ankle are working as designed.
How it is identified
A neutral runner shows even wear across the forefoot and a slight, controlled inward roll on a gait check. Old shoes tend to sit roughly flat rather than tilting in or out when placed on a surface.
What to look for
If you are neutral, choose shoes based on cushioning level, weight and feel rather than support. Almost any neutral trainer is a fair starting point, which is why fit and comfort become the deciding factors.
Common questions
What does neutral pronation mean?
It means the foot rolls inward by a balanced, average amount, absorbing impact evenly without collapsing or staying on the outer edge.
Is neutral pronation good?
It is the pattern shoe brands treat as the baseline and gives you the widest choice of footwear.
What shoes do neutral runners need?
Neutral shoes. The choice then comes down to cushioning, weight and feel rather than support features.
How do I know I am neutral?
Even wear across the forefoot and a slight controlled inward roll on a gait check are the usual signs.
Can a neutral runner wear stability shoes?
They can, but they usually do not need the extra support, so neutral shoes are the simpler match.
The gait cycle
Running Gait Cycle
What is the gait cycle?
The gait cycle is one full repetition of running motion for a single leg, measured from one footstrike to the next strike of the same foot. It is split into the stance phase, when the foot is on the ground, and the swing phase, when the leg moves forward through the air.
Why it matters
Understanding the gait cycle helps explain where impact, support and propulsion happen. Coaches and gait analysts break the run into these phases to spot where a runner loses efficiency or where strain might build, such as a long ground contact or a heavy landing.
The phases
Stance covers initial contact, midstance and toe-off, where the foot absorbs load and then pushes off. Swing covers the leg lifting, swinging through and reaching forward for the next strike. Running differs from walking because it includes a flight phase, when both feet are off the ground.
What to look for
A smooth gait cycle has a controlled landing, a stable midstance and a strong toe-off, with little wasted up-and-down movement. Many running metrics, such as cadence and ground contact time, are simply ways of measuring parts of this cycle.
Common questions
What is the gait cycle in running?
It is one full sequence of motion for a leg, from one footstrike to the next strike of the same foot.
What are the phases of the gait cycle?
Stance, when the foot is on the ground, and swing, when the leg moves through the air. Running also has a flight phase.
How is running gait different from walking?
Running includes a flight phase where both feet are off the ground at once, which walking does not.
Why do coaches study the gait cycle?
It shows where impact, support and propulsion happen, helping to spot inefficiency or strain.
Does the gait cycle affect shoe choice?
Shoes are tuned to support different points of the cycle, such as landing cushioning and toe-off flexibility.
Running Gait Analysis
What is gait analysis?
Gait analysis is a structured look at how you run. In its simplest form a trained person watches you run on a treadmill, often filming your feet and legs in slow motion, to see how you land, how much you pronate and how your stride looks. More advanced labs add force plates and motion sensors.
Why it matters
The main use of gait analysis is to match a runner to suitable shoes and to flag patterns that might be worth addressing, such as heavy overpronation or a very hard heel landing. It turns guesswork about your stride into something you can see.
What it measures
A basic in-store analysis looks at footstrike, pronation and overall balance. A fuller analysis can measure cadence, ground contact time, stride length and joint angles. The depth depends on the equipment and the purpose, from shoe fitting to coaching.
What to look for
Treat a shop gait analysis as a helpful guide rather than a medical diagnosis. Use it to narrow your shoe options and to understand your tendencies. If you have ongoing pain, a specialist assessment goes further than a shop screen.
Common questions
What is gait analysis?
It is a structured observation of how you run, usually on a treadmill with video, to see footstrike, pronation, cadence and form.
What does gait analysis tell me?
It shows how you land, how much you pronate and how balanced your stride is, which helps match you to suitable shoes.
Is shop gait analysis accurate?
It is a useful guide for shoe fitting but not a medical diagnosis. Specialist labs measure far more detail.
Do I need gait analysis to buy shoes?
No, but it can help, especially if you are unsure whether you need neutral or stability shoes.
How long does gait analysis take?
A basic in-store check usually takes a few minutes of running on a treadmill while your stride is filmed.
Foot Transition
What is foot transition?
Foot transition is the way your foot rolls forward through the time it spends on the ground, from the moment it first lands to the moment it pushes off. In a typical stride the load moves from the outer part of the landing, inwards and forwards through the midfoot, and on to the forefoot and toes for push-off.
Why it matters
A smooth transition spreads impact over a longer moment and keeps you moving forward efficiently. A jerky or blocked transition, where the foot slaps down or gets stuck flat, can waste energy and create strain. How a shoe guides this roll is a big part of how planted or how quick it feels.
How it works
As weight passes over the planted foot, the arch flexes to absorb shock, then stiffens to give a stable platform for toe-off. Shoe features such as rocker geometry, midsole firmness and forefoot flex are all designed to shape this roll, either smoothing it out or speeding it up.
What to look for
You want a transition that feels continuous, with no harsh flat spot or abrupt tipping point. On a run, notice whether the shoe rolls you forward naturally or fights your stride. The right amount of guidance depends on your gait, which is where trying shoes on and gait advice help.
Common questions
What is foot transition in running?
It is how the foot rolls from first contact through the midfoot to toe-off during the stance phase.
Why does foot transition matter?
A smooth roll spreads impact and keeps you moving forward efficiently, while a blocked one wastes energy.
How do shoes affect foot transition?
Rocker geometry, midsole firmness and forefoot flex are all designed to smooth or speed up the roll.
Is foot transition the same as pronation?
Not quite. Pronation is the inward roll within the transition, which is one part of the whole footstrike-to-toe-off movement.
Can I improve my foot transition?
Strength and mobility work plus suitable shoes help, and gait advice can show where your roll is breaking up.
Toe-Off
What is toe-off?
Toe-off is the moment at the end of each stance phase when your foot pushes down and back against the ground and the toes lift away to begin the swing forward. It is where much of the propulsion in running is generated, driven by the calf, ankle and the big toe.
Why it matters
A strong toe-off turns the energy stored during landing and midstance into forward movement. Weak or rushed toe-off can shorten your stride behind you and reduce power. The big toe and the ball of the foot play a key role, which is why toe box fit and forefoot flexibility matter.
How it works
As your body passes over the planted foot, the heel lifts, the forefoot loads, and the ankle and toes extend to push off. Carbon plates and stiff forefoot designs in modern shoes are partly aimed at making toe-off feel snappier and more efficient.
What to look for
Good toe-off comes from hip extension and ankle strength, not just the foot. Calf raises and strong feet help. In shoes, look for a forefoot that flexes or rolls in a way that suits your stride at toe-off.
Common questions
What is toe-off in running?
It is the end of the stance phase where the foot pushes off the ground and the toes lift away to start the swing.
Why is toe-off important?
It generates much of your forward propulsion by turning stored energy into movement.
Which muscles drive toe-off?
Mainly the calf and ankle, with the big toe and ball of the foot playing a key role.
How do I improve toe-off?
Strengthen the calves, ankles and feet, and use good hip extension. Strong feet support a powerful push-off.
Do carbon plates affect toe-off?
Yes. Stiff plates and forefoot designs aim to make toe-off feel snappier and more efficient.
Flight Time
What is flight time?
Flight time is the phase of each running stride when both feet are off the ground at the same time. It is the defining feature that separates running from walking, where one foot is always in contact. It pairs with ground contact time to make up the full stride.
Why it matters
More flight time usually reflects a springier, more powerful push-off and is associated with faster running. However, every period of flight ends in a landing that the body must absorb, so more airtime also means more impact to manage. It is a trade-off rather than something to simply maximise.
How it is measured
Flight time is measured by advanced running devices that detect exactly when each foot leaves and meets the ground. Comparing flight time with ground contact time gives a picture of how springy and quick your stride is.
What to look for
Flight time tends to increase naturally as you get fitter, stronger and faster, rather than being something you force. Strength and good form let you spend more time in the air efficiently without battering your legs on each landing.
Common questions
What is flight time in running?
It is the part of each stride when both feet are off the ground at the same time.
What is the difference between running and walking?
Running has a flight time where neither foot touches the ground, while in walking one foot is always in contact.
Is more flight time better?
More flight time often means a springier, faster stride, but each period of flight ends in a landing the body must absorb.
How is flight time measured?
Advanced running devices detect exactly when each foot leaves and meets the ground.
How do I increase flight time?
It tends to rise naturally with fitness, strength and speed rather than being something you force.
Cadence & metrics
Running Cadence
What is cadence?
Cadence is how many steps you take in a minute of running, counting every footfall from both legs. A figure of 170 to 180 steps per minute is often quoted as a guide, but the ideal varies with height, leg length, pace and terrain. It is one of the simplest running metrics to measure.
Why it matters
Cadence matters because, at a given pace, taking more, shorter steps usually means each landing is lighter and closer to your body. That can reduce the braking effect of overstriding and smooth out your stride. Most watches track cadence automatically.
How it is measured
A running watch or foot pod counts your steps and reports cadence live and as an average. You can also count footstrikes on one foot for fifteen seconds and multiply by eight. Comparing cadence at the same pace over time shows whether your stride is changing.
What to look for
If you want to adjust cadence, raise it gradually by a few percent rather than chasing a fixed number. Forcing a big jump can feel awkward and tiring. The aim is a comfortable, repeatable rhythm, not a single magic figure.
Common questions
What is running cadence?
It is the number of steps you take per minute while running, counting both feet.
What is a good running cadence?
Around 170 to 180 steps per minute is often quoted, but the right figure depends on your height, pace and stride.
How do I measure cadence?
A running watch reports it automatically, or you can count one foot's strikes for fifteen seconds and multiply by eight.
Should I increase my cadence?
If you tend to overstride, raising cadence slightly can help, but change it gradually by a few percent at a time.
Does cadence change with pace?
Yes. Cadence usually rises as you speed up and falls when you slow down or run uphill.
Running Stride Length
What is stride length?
Stride length is how far you travel between footstrikes. Sometimes it refers to the gap between two strikes of the same foot, and sometimes between left and right; the key idea is the same. Your speed is simply your stride length multiplied by your cadence.
Why it matters
Stride length matters because it is one of the two levers for running faster, alongside cadence. But longer is not always better. Reaching the foot far out in front of the body often lands the heel ahead of your centre of mass, which brakes your momentum and increases impact.
How it is measured
Running watches estimate stride length from pace and cadence. You can also work it out by dividing your speed by your step rate. Tracking it helps you see whether you are gaining speed by stepping longer or by stepping more often.
What to look for
Aim for a stride that lands the foot close to underneath you rather than far ahead. Extra length is best gained through stronger push-off and good hip extension behind you, not by overreaching in front.
Common questions
What is stride length?
It is the distance you cover between footstrikes. Your speed is stride length multiplied by cadence.
Is a longer stride better?
Not automatically. Reaching too far in front of the body causes braking and heavier landings.
How do I increase stride length safely?
Through stronger push-off and good hip extension behind you, not by overreaching in front of your body.
How is stride length measured?
Running watches estimate it from pace and cadence, or you can divide your speed by your step rate.
What is the link between stride length and cadence?
They multiply together to set your speed, so you can run faster by lengthening your stride, quickening your steps, or both.
Ground Contact Time
What is ground contact time?
Ground contact time, often shortened to GCT, is the number of milliseconds your foot stays on the ground during each footstrike. Elite runners at speed can be around 200 milliseconds or less, while recreational runners are usually higher. It is a measure of how quickly you move through the stance phase.
Why it matters
Shorter contact time is generally associated with more efficient, springier running because the foot spends less time braking and more time in the air. However, contact time naturally drops as pace increases, so it is most useful compared at the same speed.
How it is measured
GCT is measured by advanced running watches with a chest strap or foot pod that detects when the foot lands and lifts. Many devices also report left-right balance, which can reveal whether one leg spends longer on the ground than the other.
What to look for
Use ground contact time as a trend rather than a target. Improvements in strength, cadence and form tend to shorten it over time. A large imbalance between legs can be worth noting, especially after an injury.
Common questions
What is ground contact time?
It is how long your foot stays on the ground during each step, usually measured in milliseconds.
What is a good ground contact time?
Faster runners are often around 200 milliseconds or less, but it naturally falls as you speed up, so compare it at the same pace.
How is ground contact time measured?
By advanced running watches using a chest strap or foot pod that detects when the foot lands and lifts off.
Why does ground contact time matter?
Shorter contact is generally linked to more efficient, springier running with less braking.
What does left-right contact balance mean?
It shows whether one foot spends longer on the ground than the other, which can be worth watching after an injury.
Vertical Oscillation
What is vertical oscillation?
Vertical oscillation is how far your torso rises and falls with each step as you run. It is usually reported in centimetres by a running watch. Some up-and-down movement is a natural result of pushing off the ground, but a large bounce means energy is going upward instead of forward.
Why it matters
Excess vertical oscillation can waste effort, because lifting your body higher does not move you toward the finish line. Reducing unnecessary bounce, often by raising cadence slightly and landing closer to your body, can make running feel smoother and more economical.
How it is measured
It is measured by a running watch with a chest strap or pod that tracks the rise and fall of your trunk. Some devices report a vertical ratio, which compares your bounce to your stride length for a fairer picture across paces.
What to look for
Look at vertical oscillation alongside cadence and stride length rather than on its own. A shorter, quicker stride usually lowers it. Do not try to eliminate bounce completely, since a springy push-off naturally creates some vertical movement.
Common questions
What is vertical oscillation?
It is the amount your body moves up and down with each stride, usually measured in centimetres.
Is high vertical oscillation bad?
A large bounce can waste energy by lifting your body instead of moving it forward, but some movement is natural.
How do I reduce vertical oscillation?
Raising cadence slightly and landing closer to your body usually lowers it. Do not try to remove bounce entirely.
How is vertical oscillation measured?
A running watch with a chest strap or pod tracks the rise and fall of your trunk.
What is vertical ratio?
It compares your bounce to your stride length, giving a fairer comparison of oscillation across different paces.
Loading Rate
What is loading rate?
Loading rate is a measure of how fast the force on your body builds up at the moment of landing, rather than just how big the peak force is. A high loading rate means the force arrives as a sharp, sudden spike; a lower loading rate means it builds more gradually through the landing.
Why it matters
Research has linked a high loading rate with greater stress on bones and tissues for some runners, which is why a smoother landing is often encouraged. It is the abruptness of the impact, not only the total force, that seems to matter for managing strain over many thousands of steps.
How it is measured
Loading rate is usually measured in a lab using force plates that record how quickly force rises after contact. Some advanced wearables estimate related impact measures. For most runners it is more of a concept to understand than a number to chase.
What to look for
Landing with the foot closer to underneath you, keeping a reasonable cadence and avoiding a stiff, reaching overstride all tend to soften the loading rate. Cushioned shoes can also smooth the initial impact spike for many runners.
Common questions
What is loading rate in running?
It is how quickly the impact force builds up when your foot lands, not just how large the peak force is.
Why does loading rate matter?
A very sharp, fast force spike has been linked with higher strain, so a smoother landing is often preferred.
How is loading rate measured?
Usually in a lab with force plates that record how quickly force rises after the foot makes contact.
How do I lower my loading rate?
Land closer to underneath your body, keep a steady cadence and avoid a stiff reaching overstride.
Do cushioned shoes reduce loading rate?
Cushioning can soften the initial impact spike for many runners, though landing position matters too.
Foot strike
Running Foot Strike
What is foot strike?
Foot strike describes which part of your foot lands first as you run. The three common patterns are heel strike, where the back of the foot touches first, midfoot strike, where the foot lands flat, and forefoot strike, where the ball of the foot lands first. Most recreational runners are heel strikers.
Why it matters
Foot strike affects how impact is distributed and which tissues take the load. Heel striking sends force through the heel and shin, while forefoot striking loads the calf and Achilles more. There is no universally best pattern, so the right one is the one you can run comfortably and consistently.
The patterns
Heel strike is the most common and is fine for many runners, especially at easy paces. Midfoot strike spreads load fairly evenly. Forefoot strike is common at fast speeds and in sprinting. Many runners shift toward the front of the foot as they speed up.
What to look for
Rather than forcing a particular strike, focus on landing with the foot close to underneath your body. Overstriding, where the foot lands well ahead of you, tends to cause heavier braking regardless of which part touches first.
Common questions
What is foot strike in running?
It is the part of the foot that lands first each step, whether the heel, midfoot or forefoot.
Which foot strike is best?
No single pattern suits everyone. Landing close to your body matters more than which part touches first.
Is heel striking bad?
Not inherently. It is the most common pattern and works well for many runners, especially at easy paces.
Should I switch to forefoot striking?
Only cautiously. Changing foot strike shifts load to different tissues such as the calf and Achilles and takes time to adapt.
Does foot strike change with speed?
Yes. Many runners move toward the midfoot or forefoot as they speed up.
Heel Strike
What is heel strike?
Heel strike is the footstrike pattern where the heel makes contact with the ground before the rest of the foot rolls down. It is by far the most common pattern among everyday runners, particularly at easy and moderate paces. Most cushioned trainers are designed with heel strikers in mind.
Why it matters
Heel striking sends the initial impact through the heel and up the shin. This is normal and well tolerated by many runners. The concern is not the heel contact itself but heel striking while overstriding, where the foot lands well ahead of the body and brakes your momentum.
How it works
In a smooth heel strike the foot lands close to underneath you, the heel touches briefly, then the foot rolls forward to midstance and toe-off. A higher heel-to-toe drop and a cushioned heel help absorb the landing for runners with this pattern.
What to look for
If you heel strike, focus on landing closer to your body and keeping a reasonable cadence rather than trying to change your strike. A well-cushioned heel and a supportive shoe usually make heel striking comfortable.
Common questions
What is a heel strike?
It is when the back of the foot lands first on each step before the foot rolls forward.
Is heel striking bad for you?
Not in itself. It is the most common pattern and works well for many runners. Overstriding is the bigger concern.
What shoes suit heel strikers?
Shoes with a cushioned heel and a higher heel-to-toe drop help absorb the landing.
How do I heel strike more safely?
Land with the foot closer to underneath your body and keep a steady cadence rather than reaching out in front.
Should heel strikers change their form?
Usually not. Reducing overstriding is more useful than forcing a different footstrike.
Midfoot Strike
What is midfoot strike?
Midfoot strike is when your foot lands flat or nearly flat, so the heel and the ball of the foot touch down at almost the same time. The contact point is around the middle of the foot rather than the heel or the toes. It is common among efficient distance runners.
Why it matters
Landing at the midfoot tends to distribute impact across a larger area and often places the foot closer to underneath the body, which reduces braking. Many runners find it a comfortable middle ground, though it loads the foot and calf differently from heel striking.
How it works
A midfoot striker lands with the foot fairly level, moves smoothly through midstance, and pushes off from the forefoot. Shoes with a moderate heel-to-toe drop and balanced cushioning tend to suit this pattern well.
What to look for
If you naturally midfoot strike, you generally do not need to change anything. If you are trying to move toward it, do so gradually, because it shifts more load onto the calf and Achilles than heel striking does.
Common questions
What is a midfoot strike?
It is when the foot lands roughly flat, with the heel and ball of the foot touching down almost together.
Is midfoot striking better than heel striking?
It spreads impact and reduces braking for many runners, but it is not automatically better and loads the calf more.
What shoes suit midfoot strikers?
Shoes with a moderate heel-to-toe drop and balanced cushioning generally work well.
How do I move toward a midfoot strike?
Make the change gradually, since it shifts more load onto the calf and Achilles, which need time to adapt.
Do distance runners midfoot strike?
Many efficient distance runners do, but plenty of strong runners heel strike too.
Forefoot Strike
What is forefoot strike?
Forefoot strike is when you land on the ball of the foot first, with the heel either lightly kissing the ground afterward or staying off it. It is the natural pattern when sprinting and is common among fast runners and on the toes during speed work.
Why it matters
Forefoot striking uses the calf, Achilles and the foot's own spring to absorb and return energy. This can feel quick and responsive, but it places a lot of load on the calf and Achilles, so runners who switch too fast often get sore or strained. It suits some runners well and others not at all.
How it works
The ball of the foot lands, the arch and Achilles store energy as the heel lowers, and that energy helps power toe-off. Low-drop and racing shoes are often built with forefoot and midfoot strikers in mind, with less heel cushioning.
What to look for
If forefoot striking is natural for you, choose shoes that match it rather than tall, soft heels. If you are moving toward it, build calf and Achilles strength first and increase the amount gradually over weeks, not days.
Common questions
What is a forefoot strike?
It is when the ball of the foot lands first, with the heel touching lightly afterward or not at all.
Is forefoot striking better?
It can feel quick and springy, but it loads the calf and Achilles heavily and does not suit everyone.
What shoes suit forefoot strikers?
Lower heel-to-toe drop and racing shoes, which place less cushioning under the heel.
How do I switch to forefoot striking safely?
Build calf and Achilles strength first, then increase the amount gradually over weeks to avoid strain.
When do runners forefoot strike?
Most often during sprinting and fast running, and some efficient runners use it at all paces.
Form & economy
Running Economy
What is running economy?
Running economy is a measure of how efficiently you run, defined as the amount of energy or oxygen you use to maintain a given pace. Two runners with the same fitness can perform very differently if one uses less energy at the same speed. It is often described as the running equivalent of fuel efficiency.
Why it matters
Running economy is one of the biggest factors in distance performance alongside aerobic fitness. Improving it means you can hold the same pace for less effort, or go faster for the same effort. Small gains in economy can make a noticeable difference over long distances.
What affects it
Economy is influenced by your form, cadence, strength, body composition, fatigue and your shoes. Lighter, springier shoes and a smooth, low-bounce stride tend to improve it. Strength work and consistent training also help the body use energy more efficiently.
What to look for
You do not need lab testing to work on economy. Steady training, strength and mobility work, a comfortable cadence and well-matched shoes all contribute. Track whether a given pace feels easier over time as a practical sign of progress.
Common questions
What is running economy?
It is how much energy or oxygen you use to run at a given pace. Lower cost means you are more efficient.
Why does running economy matter?
It is a major factor in distance performance. Better economy lets you hold a pace for less effort.
What improves running economy?
Smooth form, a comfortable cadence, strength work, consistent training and lighter, springier shoes all help.
Do shoes affect running economy?
Yes. Lighter and more responsive shoes can reduce the energy cost of running at a given pace.
Can I improve economy without a lab?
Yes. Steady training, strength and mobility work and well-matched shoes all help, and a pace feeling easier is a practical sign.
Leg Stiffness
What is leg stiffness?
Leg stiffness describes how much your leg compresses when it takes your weight on landing. Runners are often modelled as a spring-mass system, where the whole leg behaves like a single spring. A stiffer leg compresses less and rebounds faster, while a more compliant leg sinks further before springing back.
Why it matters
Leg stiffness is closely tied to running economy and speed. A well-tuned, stiffer spring returns more of the energy from each landing, so you waste less effort and keep a quicker, lighter stride. Too little stiffness can feel sluggish and mushy, while too much can raise impact forces and injury risk.
How it works
The stiffness you feel comes from your muscles, tendons and the way you land, not just your bones. The calf and Achilles act like the main spring, tensioning on contact and recoiling at toe-off. Cadence, footstrike and how braced your ankle is on landing all change how stiff the leg behaves.
What to look for
You cannot read leg stiffness off a spec sheet, but you can feel and train it. A quick, light, springy stride usually means a well-tuned spring. Strength work for the calves and feet, plus plyometric drills, build the stiffness that supports an efficient stride without forcing it.
Common questions
What is leg stiffness in running?
It is how much your leg resists compression on landing, behaving like a spring that stores and returns energy.
Is more leg stiffness better?
Up to a point. A well-tuned, stiffer leg improves economy, but too much raises impact forces and injury risk.
How do I improve leg stiffness?
Calf and foot strength work plus plyometric drills help build a springier, better-tuned stride.
Does leg stiffness affect speed?
Yes. A more efficient leg spring returns more energy per stride, supporting a quicker, lighter pace.
Is leg stiffness the same as being tense?
No. It is the elastic response of the leg as a spring, not muscular tension or a stiff, rigid feeling.
Running Form
What is running form?
Running form is the whole picture of how you move as you run, including your posture, where your foot lands, how your arms swing, your cadence and how much tension you carry. There is no single perfect form, but efficient runners tend to share certain habits, such as landing close to the body and staying relaxed.
Why it matters
Form matters because it affects efficiency and the load on your body. Wasteful movements, like a heavy overstride or a stiff, hunched posture, cost energy and can concentrate strain. Better form usually means running feels smoother and more sustainable rather than dramatically faster overnight.
Key elements
Useful cues include a tall but relaxed posture, a slight lean from the ankles, arms swinging forward and back rather than across the body, a quick light cadence, and the foot landing under you. These small pieces add up to a smoother stride.
What to look for
Change form gradually and one cue at a time, because the body adapts slowly and big sudden changes can cause new aches. Filming yourself or a gait check can show what your stride actually looks like versus how it feels.
Common questions
What is running form?
It is the overall pattern of how you move when you run, including posture, arm swing, foot placement, cadence and relaxation.
Is there one perfect running form?
No. Efficient runners share habits like landing close to the body, but the ideal form is individual.
How do I improve my running form?
Work on one cue at a time, such as posture or cadence, and change gradually to let the body adapt.
What are good form cues?
A tall relaxed posture, a slight ankle lean, arms swinging forward and back, a quick cadence and landing under your body.
Can changing form cause injury?
Sudden big changes can cause new aches, so adjust form slowly and one element at a time.
Running Arm Swing
What is arm swing?
Arm swing is the way your arms move in time with your legs as you run. As one leg drives forward the opposite arm swings forward, which balances the twisting forces of running and keeps your body moving in a straight line. It is a natural part of an efficient stride.
Why it matters
Although the legs do the main work, the arms help set your rhythm and counter the rotation of your hips and shoulders. A tense or sideways arm swing wastes energy and can twist the torso, while a relaxed swing can support a quicker, smoother cadence.
How it works
Efficient arm swing usually keeps the elbows bent around ninety degrees, with the hands relaxed and the arms moving forward and back close to the body rather than crossing the midline. The shoulders stay loose and low rather than creeping up toward the ears.
What to look for
Check that your shoulders are relaxed, your hands are not clenched, and your arms drive backward as much as forward. Driving the elbows back can help when you want to lift your pace, and relaxing the upper body helps you stay smooth when tired.
Common questions
What is arm swing in running?
It is the movement of your arms in time with your legs, which balances rotation and helps set your rhythm.
Does arm swing matter?
Yes. The arms counter the twisting of the hips and shoulders and can support a smoother, quicker cadence.
What is good arm swing technique?
Elbows around ninety degrees, hands relaxed, arms moving forward and back close to the body rather than across it.
Should my arms cross my body?
Crossing the midline wastes energy and twists the torso, so a forward-and-back swing is generally better.
How do arms help me run faster?
Driving the elbows back more strongly can help lift your pace by supporting a quicker leg turnover.
Hip Drop
What is hip drop?
Hip drop, sometimes called contralateral pelvic drop, is when the pelvis tilts down on the side of the leg that is swinging through, while the other leg supports your weight. A small amount happens to everyone, but a noticeable dip means the standing leg's hip muscles are not holding the pelvis level.
Why it matters
The hip stabiliser muscles, especially the glutes on the standing-leg side, are meant to keep your pelvis fairly level during stance. When they are weak or fatigued, the hip drops more, which can change the alignment of the knee and ankle and is sometimes associated with recurring running strains.
How it is identified
Hip drop is usually seen on a video gait analysis from behind, where the pelvis can be watched tilting with each step. Coaches and physios look at how much the hip dips and whether one side is worse than the other.
What to look for
Strengthening the glutes and hip stabilisers, with exercises such as single-leg work and side-lying leg raises, often reduces excess hip drop. Good running posture and not overstriding also help the hips stay more level.
Common questions
What is hip drop in running?
It is when the pelvis tilts down on the swinging-leg side while the other leg supports your weight.
Is some hip drop normal?
Yes. A small amount happens to everyone. A large, noticeable drop is the concern.
What causes excessive hip drop?
Usually weak or fatigued hip stabiliser muscles, especially the glutes on the standing-leg side.
How do I fix hip drop?
Strengthening the glutes and hip stabilisers with single-leg and side-lying exercises often helps, along with good posture.
How is hip drop spotted?
It is usually seen on a video gait analysis filmed from behind, watching the pelvis tilt with each step.