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. 2022 Feb 8;36(4):941–947. doi: 10.1519/JSC.0000000000004230

Table 1.

Inter-contraction reliability of measurements in subjects (n = 25).*

PMaj thickness (mm) Inter-contraction reliability (N = 25)
ICC3,1 (95% Cl) SEM (mm) CVME (%)
Baseline (resting state) 0.988 (0.977–0.994) 0.33 2.05
Resistance training without biofeedback
 50% of 1RM 0.981 (0.964–0.991) 0.75 2.63
 80% of 1RM 0.973 (0.949–0.987) 0.93 2.92
Resistance training with biofeedback
 50% of 1RM 0.974 (0.926–0.989) 1.01 3.06
 80% of 1RM 0.972 (0.945–0.987) 1.00 2.91
*

PMaj = pectoralis major; ICC = intraclass correlation coefficient; CI = confidence interval; CVME = coefficient of variation method error; 1RM = 1-repetition maximum.