Kinematic and Electromyographic Activity Changes during Back Squat with Submaximal and Maximal Loading
Table 3
Repeated measures analysis of variance results of mean (±SD) EMG activity with 80, 90, and 100% loads of 1RM during descending and ascending phases of squat as a percentage of maximal voluntary isometric contraction (% MVIC).
Muscles
80%
90%
100%
Descend
Ascend
Descend
Ascend
Descend
Ascend
RF
35.8 ± 14
36 ± 16.2
51 ± 39.1
47.6 ± 26.9
53.8 ± 36.5
52.1 ± 38.3
VL
52.4 ± 20
59 ± 28.2
60.6 ± 40.8
65.7 ± 33.9
63 ± 40.9
72.4 ± 65.9
VM
52.8 ± 32.7
61.7 ± 43.8
64.6 ± 42.8
70.4 ± 46.7
72 ± 57.6
76.4 ± 61.8
ES
35.8 ± 14.4
41.9 ± 16.1
50.1 ± 25.2
52.9 ± 25.2
52.1 ± 27.2
55.8 ± 26
GM
19.7 ± 11.5
37.2 ± 20
26 ± 15.7
44.8 ± 24.6
30 ± 17.9
50.2 ± 30.8
BF
19.6 ± 22.5
29 ± 24.8
22.1 ± 23.2
34.3 ± 28.3
23.8 ± 16.9
39.6 ± 23.1
ST
17 ± 10.4
29.1 ± 24
15.9 ± 7.2
29.1 ± 16.9
19.19 ± 11.4
39.5 ± 28.3
Repeated measures analysis of variance results significantly different () from 80%.
