In this episode we welcomed Dr Luke Kelly who has published extensively in the field of plantar intrinsic foot muscle function. Listen to him talk about the spring-like function of the human foot, and why it is false to assume a flatter foot is a "weaker" foot. He also explains why he is personally NOT a fan of the 'short foot exercise' (and the exercise he favours instead) and why strengthening the intrinsic muscles will never make the medial longitudinal arch 'higher'.