Table 2.
Kinetic Variable |
Height |
|||
0.30 m |
0.50 m |
|||
No VPAC |
VPAC |
No VPAC |
VPAC |
|
Vertical ground reaction force, N | 1352.2 ± 471.9 | 1283.6 ± 379.2 | 1745.2 ± 568.4 | 1623.9 ± 485.7 |
Ankle-flexion moment, Nm | 59.5 ± 31.5 | 51.6 ± 40.3 | 68.2 ± 42.8 | 69.5 ± 34.3 |
Ankle-inversion moment, Nm | 11.9 ± 21.8 | 11.7 ± 20.3 | 15.5 ± 28.1 | 11.6 ± 15.8 |
Knee-flexion moment, Nm | 38.2 ± 38.9 | 38.7 ± 37.8 | −67.9 ± 38.3 | −68.7 ± 46.6 |
Knee-abduction moment, Nma | −40.2 ± 6.6 | −21.0 ± 6.4 | 46.4 ± 46.6 | 40.5 ± 34.3 |
Hip-flexion moment, Nm | 143.8 ± 83.5 | 133.1 ± 61.9 | 208.2 ± 86.8 | 200.2 ± 87.3 |
Hip-abduction moment, Nm | 100.5 ± 215.4 | 54.6 ± 116.1 | 71.7 ± 135.4 | −78.2 ± 189.6 |
Ankle-energy absorption, W | −13.9 ± 44.7 | −19.8 ± 42.9 | 157.8 ± 274.5 | 94.8 ± 160.0 |
Knee-energy absorption, Wa | −29.7 ± 64.1 | −37.3 ± 69.0 | 373.1 ± 300.9 | 481.1 ± 286.7 |
Hip-energy absorption, Wb | −8.8 ± 15.7 | −13.8 ± 20.2 | 301.6 ± 254.3 | 277.6 ± 253.6 |
Abbreviation: VPAC, preemptive abdominal contraction.
VPAC effect for the 0.30-m height (P < .05).
VPAC effect for the 0.50-m height (P < .05).