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Figure 4


Fig. 4. An equal amount of force is produced in the two heads of the gastrocnemius during stance. Peak force significantly (P<0.05) increases in both the lateral head (red) and the medial head (blue) with speed. With increasing speed, the time of peak force occurs consistently later in the medial head. Other timing variables were unchanged across changes in mass and speed. For speeds 1–2 m s–1, Ni=5 for LG and Ni=4 for MG variables. For 2.5 m s–1, Ni=4 for LG variables and Ni=3 for MG variables.





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