Table 1. The height, peak power, and RFD of the countermovement jump performance across all time points (mean ± SD).
|
Baseline |
Post 30 seconds |
ES |
Post 3 minutes |
ES |
Post 6 minutes |
ES |
Post 9 minutes |
ES |
| Height (cm) |
| CRT |
51.7±4.96 |
51.99±4.74 |
0.06 |
52.15±4.95 |
0.09 |
52±4.53 |
0.06 |
51.25±4.44 |
–0.1 |
| 20%VRT |
51.95±4.26 |
52.09±4.18 |
0.03 |
52.25±4.92 |
0.07 |
52.39±5.31 |
0.09 |
52.16±4.83 |
0.05 |
| 30%VRT |
51.71±4.59 |
52.77±4.93 |
0.22 |
53±4.66* |
0.28 |
52.87±4.92* |
0.24 |
52.43±4.85 |
0.15 |
| 40%VRT |
52.02±4.69 |
53.39±4.53* |
0.3 |
53.91±4.73* |
0.4 |
53.87±5.16* |
0.38 |
53.25±4.52* |
0.27 |
| Peak power (w/kg) |
| CRT |
52.06±5.46 |
52.64±5.53 |
0.11 |
52.63±5.64 |
0.1 |
52.09±4.81 |
0.01 |
51.85±4.68 |
–0.04 |
| 20%VRT |
52.53±4.75 |
52.63±4.17 |
0.02 |
53.25±5.03 |
0.15 |
53.2±5.5 |
0.13 |
52.48±5.21 |
–0.01 |
| 30%VRT |
52.06±4.96 |
52.93±5.79 |
0.16 |
53.7±4.89* |
0.33 |
54±5.53* |
0.37 |
52.67±5.28 |
0.12 |
| 40%VRT |
52.6±4.85 |
53.91±4.67 |
0.28 |
54.43±5.55 |
0.35 |
54.17±5.55 |
0.3 |
52.92±5.65 |
0.06 |
| RFD (N/s·kg) |
| CRT |
68.58±11.06 |
67.43±14.32 |
–0.09 |
68.62±15.59 |
0 |
65.2±18.6 |
–0.22 |
66.38±14.37 |
–0.17 |
| 20%VRT |
66.8±13.37 |
70.01±13.63 |
0.24 |
70.76±16.43 |
0.26 |
70.39±15.63 |
0.25 |
70.12±14.92 |
0.23 |
| 30%VRT |
68.49±15.13 |
74.53±15.15* |
0.4 |
75.43±16.32* |
0.44 |
71.21±14.71 |
0.18 |
70.07±16.22 |
0.1 |
| 40%VRT |
65.18±14.11 |
67.34±14.62 |
0.15 |
74.12±18.58* |
0.54 |
73.72±19.31 |
0.5 |
70.44±17.88 |
0.33 |
CRT, constant resistance training; VRT, variable resistance training; RFD, rate of force development; ES, effect size.
*P ≤ 0.05: Statistically significant differences compared with baseline.
