Dr's Casebook: Peroneus tertius muscle is an appearing muscle which is helpful in running

Dr Keith Souter writes: This week I have been focused more on larger running muscles.

I took part in the Wakefield Hospice 10k last Sunday morning.

I would have liked to be able to keep up with the top half of the field, but at my age I am more concerned about completion of the race to pick up one of the coveted finisher T-shirts rather than my time.

I accept the facts of increasing age and that some people’s bodies are better equipped than others.

By and large we all have the same muscles, yet there are sometimes subtle differences. Anatomically, each muscle has an origin and an insertion. Its origin is the bone that it is anchored to, and its insertion is to the bones or structure that it has the function of moving.

Both the origin and the insertion can vary slightly in individuals.

In addition to these subtle differences, there are muscles that are ‘coming’ or ‘going.’