Figure 4
From: Operating length and velocity of human vastus lateralis muscle during walking and running
Vastus lateralis muscle-tendon unit (MTU) length, muscle fascicle length and electromyographic (EMG) muscle activity. Individual (n = 15) data are shown in thin grey lines and means in thick black lines separately for the walking (left column) and running (right column) step cycle. EMG activity was normalised to the maximum achieved during running. Grey shadings refer to the stance phase.
