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Fig. 3. Fascicle velocities, lengths and electromyographic activity of the plantaris muscle for six jumps of differing lengths: (A,B) 80 cm, (C) 75 cm, (D,E) 50 cm, (F) 40 cm. Longer jumps are characterized by a bimodal pattern of shortening velocity, with the fastest velocities occurring early and late in the jump.