Fig. 4

a A comparison of time to first alternation of activity among muscles during static contractions at each joint angle. The first alternation of muscle activity is observed early in all exercise times during static contractions at an angle of 110°. *P < 0.05, Significantly different from the value at 110°,^#P < 0.05, significantly different from the value at 100°. b A comparison of time to first recruitment of the lateral gastrocnemius (LG) during static contraction at each joint angle. Note that LG is hardly recruited at an angle of 100°, i.e., far from the recruitment threshold of LG (approximately 130°). There is no significant difference between values at the ankle angles of 110° and 120°. *P < 0.05, Significantly different from the value at 100°