Abstract
Foot muscles are divided into two muscle groups: plantar intrinsic foot muscles (PIFM) and the extrinsic foot muscles (EFM); however, it is still unclear how PIFM and EFM separately contribute to the force generating capacity of the foot. Muscle force produced by isometric contractions is specific to the muscle length. From the length-tension relations of EFM, the contribution of EFM to the force generating capacity of the foot might be able to estimate to some extent. The purpose of the study was to investigate the relationships between ankle-knee joint angle and maximum isometric force of the toe flextion in the sitting position. We found that there was the optimum joint angle for the maximum isometric force of the toe flexion in the sitting position.
