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. 2021 Apr 12;9:e11199. doi: 10.7717/peerj.11199

Table 1. Mean ± SD peak vertical ground reaction force (vGRF), vertical impulse, and contact time calculated from the ground reaction forces measured by the treadmill for all participants.

Speed [m/s] Peak vGRF [BW] Vertical Impulse [BW*s] Contact Time [s]
Females (n = 24) 3.8 2.79 ± 0.19 0.34 ± 0.02 0.201 ± 0.012
4.8 2.94 ± 0.21 0.32 ± 0.02 0.175 ± 0.011
Males (n = 13) 3.8 2.94 ± 0.20 0.35 ± 0.01 0.204 ± 0.009
4.1 3.00 ± 0.21 0.35 ± 0.01 0.196 ± 0.008
5.4 3.14 ± 0.24 0.32 ± 0.01 0.168 ± 0.007