Table 3.
Normalized mean RMS (%) of the countermovement jump performance across all time (mean ± SD).
Phase
Baseline
Post 30 seconds
ES
Post 3 minutes
ES
Post 6 minutes
ES
Post 9 minutes
ES
VM
CRT
ECC
32.96 ± 10.1
31.12 ± 10.92
–0.17
32.35 ± 9.01
–0.06
30.94 ± 13.64
–0.17
31.95 ± 9.26
–0.1
CON
75.54 ± 20.92
78.8 ± 23.26
0.15
78.43 ± 18.05
0.15
72.14 ± 19.32
–0.17
71.9 ± 20.49
–0.18
20%VRT
ECC
35.75 ± 8.03
35.13 ± 11.19
–0.06
36.31 ± 9.45
0.06
35.54 ± 10.83
–0.02
37.43 ± 16
0.13
CON
83.68 ± 30.32
81.91 ± 2.5
–0.08
79.7 ± 25.26
–0.14
79.49 ± 22.97
–0.16
79.8 ± 18.84
–0.15
30%VRT
ECC
33.86 ± 6.98
34.6 ± 8.77
0.09
32.22 ± 6.57
–0.24
32.31 ± 8.14
–0.2
34.2 ± 7.35
0.05
CON
69.25 ± 11.11
75.41 ± 13.77
0.49
76.42 ± 14.34
†
‡
0.56
68.62 ± 13.37
–0.05
65.18 ± 20.15
–0.25
40%VRT
ECC
29.69 ± 13.48
30.35 ± 12.52
0.05
29.81 ± 12.3
0.01
28.88 ± 10.66
–0.07
28.77 ± 11.56
–0.15
CON
64.93 ± 26.05
69.29 ± 22.37
0.18
69.3 ± 20.88
0.19
66.39 ± 20.83
0.06
61.73 ± 23.38
–0.15
VL
CRT
ECC
36.67 ± 18.49
37.5 ± 23.1
0.04
40.12 ± 24.93
0.16
33.12 ± 15.31
–0.21
34.87 ± 18.69
–0.1
CON
57.24 ± 12.25
55.98 ± 14.26
–0.09
59.65 ± 17.49
0.16
54.71 ± 16.97
–0.17
56.75 ± 21.18
–0.03
20%VRT
ECC
31.6 ± 8.59
30 ± 9.68
–0.17
29.41 ± 8.16
–0.26
32 ± 9.68
0.04
30.83 ± 11.28
–0.08
CON
66.3 ± 16.08
68.87 ± 17.37
0.15
70.6 ± 21.4
0.23
67.5 ± 19.45
0.07
64.98 ± 19.13
–0.07
30%VRT
ECC
36.8 ± 20.8
34.46 ± 16.32
–0.13
31.12 ± 18.26
–0.29
35.09 ± 23
–0.08
34.96 ± 21.98
–0.09
CON
63.86 ± 20.08
67.76 ± 19.2
0.2
70.59 ± 20.83
*
‡
0.33
68.5 ± 18.48
‡
0.24
62.22 ± 20.3
–0.08
40%VRT
ECC
31.62 ± 7.25
35.37 ± 12.43
0.37
30.79 ± 9.01
–0.1
31.88 ± 9.73
0.03
31.97 ± 10.93
0.04
CON
57.08 ± 24.64
63.58 ± 26.31
0.26
66.99 ± 27.39
*
0.38
64.08 ± 25.33
*
0.28
58.8 ± 24.85
0.07
MG
CRT
ECC
21.14 ± 8.3
20.16 ± 9.8
0.2
23.17 ± 11.96
0.2
22.39 ± 12.15
0.12
18.51 ± 7.36
–0.34
CON
80.57 ± 24.95
81.75 ± 23.34
0.05
80.93 ± 27.54
0.01
79.6 ± 20.45
–0.04
78.04 ± 23.06
–0.11
20%VRT
ECC
22.22 ± 12.23
22.93 ± 13.84
0.05
22.57 ± 11.66
0.03
20.91 ± 11.64
–0.11
21.7 ± 11.6
–0.04
CON
88.1 ± 29.5
85.63 ± 28.01
–0.09
85.88 ± 28
–0.08
90.37 ± 31.45
0.07
84.27 ± 28.93
–0.13
30%VRT
ECC
21.12 ± 13.16
19.54 ± 7.63
–0.15
19.4 ± 13.14
–0.13
23.98 ± 16.25
0.19
24.4 ± 16.92
0.22
CON
89.75 ± 40.97
98.25 ± 52.1
0.18
90.11 ± 35.52
0.01
90.1 ± 34.04
0.01
85.91 ± 35.17
–0.1
40%VRT
ECC
26.81 ± 15.67
22.63 ± 13.95
–0.28
21.91 ± 13.24
–0.34
24.03 ± 14.96
–0.18
21.8 ± 13.2
–0.35
CON
90.92 ± 33.22
90.53 ± 31.32
–0.01
94.33 ± 29.28
0.11
89.3 ± 32.92
–0.05
86.71 ± 33.25
–0.13
CRT, constant resistance training; VRT, variable resistance training; VM, vastus medialis; VL, vastus lateralis, MG, medial gastrocnemius; ECC, eccentric; CON, concentric; ES, effect size.
*
P ≤ 0.05: Statistically significant differences compared with baseline
† P < 0.5, Statistically significant differences compared with post 6 minutes
‡P < 0.5, Statistically significant differences compared with post 9 minutes.