Figure 1. The EMG profile of four muscle groups of one stride

From

Muscular Activity of Lower Extremity Muscles Running on Treadmill Compared with Different Overground Surfaces

Lin Wang, Youlian Hong, Jing Xian Li

American Journal of Sports Science and Medicine. 2014, 2(4), 161-165 doi:10.12691/ajssm-2-4-8