The Hallux (Big Toe) Explained

In brief: The hallux is the medical name for the big toe, the largest and strongest toe. It plays a major role in push-off and balance, bearing much of the force at the end of each stride, which is why big-toe room and flexibility matter in a shoe.

What is the hallux?

The hallux is the anatomical name for the big toe. It is the largest and strongest toe, with two bones rather than the three found in the other toes, and it sits at the inner front of the foot.

Why it matters

The big toe carries a large share of the load at push-off and is central to balance. As the heel lifts and weight rolls forward, the hallux provides the final, powerful contact that drives you forward.

How it works

At toe-off the hallux bends and presses into the ground, working with the small sesamoid bones beneath its joint to give a strong push. A stiff or restricted big toe changes how the front of the foot loads.

What to look for

A shoe needs enough length and width at the big toe so it can extend and spread without being squeezed against the side or end of the toe box. This supports a natural, comfortable push-off.

The hallux and your running kit at OD's

Big-toe room supports a strong, comfortable stride. The team in St Helens can help you check toe-box length and width, and we offer next-day delivery and free click and collect.