In vivo force-length relation in the gastrocnemius medialis in extreme dorsiflexion

The force length relation (f-l-r) of the gastrocnemius medialis (GM) was assessed at extreme dorsiflexed positions using ultrasound, motion capture, electromyography (EMG) and dynamometry. Thereby, the beginning of the descending limb of the f-l-r was experimentally shown, allowing the determination of an optimal fascicle length for the GM.