Fig. 8.
Least-square regression correlations between muscle work (y-axis) and fascicle strain (x-axis) for the TrLONG and TrLAT during the phases determined by TrLAT stretch, TrLAT shortening and net over stance for the lead limb (•) and lag limb (○) of an up jump, and for down jumps (red ▵). Correlations were higher in the TrLONG overall. Correlations for both muscle heads were lowest during elbow extension, indicating that muscle stress most strongly determined work output during this period. Correlations were assessed on the basis of pooled data from all individuals. A weak correlation between muscle work and fascicle strain indicates that work was determined by muscle stress. Two samples were simultaneously recorded from the long head as in Fig. 1.