Kinematic and Electromyographic Activity Changes during Back Squat with Submaximal and Maximal Loading

Table 2

Repeated measures analysis of variance results of mean (±SD) EMG activity during squats performed with 80, 90, and 100% loads of 1RM as a percentage of maximal voluntary isometric contraction (% MVIC).

Muscles	80%	90%	100%
RF	36.1 ± 13.8	49.6 ± 34.3	52.3 ± 36.9
VM	56.9 ± 37.1	67.4 ± 43.5	73.6 ± 58.6
VL	53.6 ± 24.2	63.2 ± 37.8	67.7 ± 54.7
ES	40.8 ± 17.8	51.5 ± 25.1	53.8 ± 26.9
GM	27.8 ± 15.8	34.1 ± 19.3	38.7 ± 23
BF	23.5 ± 23.1	27.7 ± 25.3	30.4 ± 17.5
ST	21.5 ± 11.2	22.7 ± 15.7	28.2 ± 18.4

Repeated measures analysis of variance results significantly different () from 80%.