Fig. 5. (A) Histogram showing the mean (± S.E.M.) lengthening, shortening and net strains recorded from the four wallabies during level versus incline hopping (averaged for trials at 3.3 m s^-1 and 4.2 m s^-1). (B) Stance phase strains were measured over two intervals (based on level hopping recordings): from foot down to peak force and from peak force to foot off. Although the magnitude of lengthening and shortening strain was greater in the plantaris (PL) compared with the lateral gastrocnemius (LG), the net fascicle strains of the two muscles measured over the course of limb support were quite similar.