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. 2010 Jun 25;588(Pt 16):3119–3130. doi: 10.1113/jphysiol.2010.192856

Figure 2. Increase in vastus lateralis EMG during the concentric phase of resistance exercise and change in mean power frequency during the isometric phase of resistance exercise.

Figure 2

A, percentage increase in vastus lateralis EMG (activation) during the concentric phase of resistance exercise. Numbers in parentheses of key following 3SET indicate set number. B, the change in mean power frequency (MPF) during the isometric phase of resistance exercise. Times with different lower-case letters indicate significantly differences from first repetition (0% completion): a for 1SET, b for 3SET(1), c for 3SET(2), d for 3SET(3), P < 0.05. *Significantly different from 1SET at that time point, P < 0.05.