Table 2: Comparison of the muscle thickness activation ratio of TrA between the monitoring group and control group in 0, 4, and 8 weeks (mean ± SD).

Monitoring groupControl groupBetween-group value

LeftBaseline1.44 ± 0.051.42 ± 0.050.251
4 weeks1.60 ± 0.031.50 ± 0.07≤0.001
8 weeks1.67 ± 0.051.56 ± 0.04≤0.001
Intragroup value (baseline vs 8 weeks)≤0.001≤0.001
Mauchly’s sphericity test W = 0.970 ()

RightBaseline1.45 ± 0.071.44 ± 0.070.552
4 weeks1.60 ± 0.041.55 ± 0.04≤0.001
8 weeks1.67 ± 0.061.58 ± 0.06≤0.001
Intragroup value (baseline vs 8 weeks)≤0.001≤0.001
Mauchly’s sphericity test W = 0.939 ()

Activation ratio = contraction thickness/relax thickness. Compared with baseline, .