Table 1. Comparison of the RoM, peak vGRF (vGRF1 and vGRF2), and absolute occurrence time (t_vGRF1 and t_vGRF2) (mean ± SD) in the sagittal plane during landings between pre- and post-fatigue conditions.
Protocols |
Fatigue |
RoMH (°) * |
RoMK (°) *† |
RoMA (°) *† |
vGRF1 (BW) |
t_vGRF1 (ms) |
vGRF2 (BW) |
t_vGRF2 (ms) |
R-FP |
pre |
48.5 ± 17.9 |
73.8 ± 14.9 |
44.2 ± 9.0 |
1.2 ± 0.5 |
12.2 ± 1.8 |
5.8 ± 0.9 |
33.6 ± 6.5 |
post |
53.7 ± 17.5 |
78.9 ± 15.9 |
40.2 ± 9.5 |
1.1 ± 0.4 |
12.7 ± 2.6 |
5.8 ± 1.0 |
32.7 ± 7.5 |
SJ-FP |
pre |
50.4 ± 14.2 |
73.6 ± 13.4 |
37.9 ± 9.8 |
1.2 ± 0.5 |
11.9 ± 3.8 |
6.0 ± 0.8 |
33.3 ± 8.8 |
post |
58.6 ± 15.8 |
83.7 ± 13.5 |
40.4 ± 9.6 |
1.4 ± 0.3 |
11.6 ± 3.5 |
5.9 ± 0.9 |
29.9 ± 10.4 |
* Significant differences between pre- and post-fatigue conditions, with p < 0.05.† Significant fatigue × protocol interaction effects, with p < 0.05. R-FP = fatigue protocol with constant speed running; SJ-FP = fatigue protocol with shuttle sprint plus vertical jump; pre = pre-fatigue; post = post-fatigue; RoM
H = the range of motion of the hip; RoM
K = the range of motion of the knee; RoM
A = the range of motion of the ankle; vGRF1, vGRF2 = the first and second peaks of the vertical ground reaction forces; t_vGRF1, t_vGRF2 = the absolute time from contact to vGRF1, vGRF2; BW = body weight.