Fig. 8. Average muscle force, net fascicle strain and net work output for the peroneus longus (PL) analyzed over individual segments of the stretch–shorten cycle during steady speed running at 2 m s^–1 on a level, inclined and declined treadmill. (A) The lengthening region of the stretch–shorten cycle and (B) the shortening region of the stretch–shorten cycle (analyzed as the region in stance following lengthening). L₀, resting segment length.