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Table 2 Test-retest reliability of peak torque and average power from the placebo group (n = 10)

From: The effects of phosphocreatine disodium salts plus blueberry extract supplementation on muscular strength, power, and endurance

Visit 1 (Mean ± SD) Visit 2 (Mean ± SD) Grand Mean p-Value ICC ICC 95% CI SEM CV (%)
Peak Torque (N·m)
 99.82 ± 36.51 107.52 ± 44.11 103.67 0.122 0.964 0.846–0.911 9.77 9.42
Average Power (Watts)
 141.94 ± 51.92 150.79 ± 64.30 146.37 0.279 0.953 0.824–0.988 17.18 11.74
  1. CV (%) coefficient of variation; ICC intraclass correlation coefficient; ICC 95% CI intraclass correlation coefficient 95% confidence interval; p-value type I error rate for the one-way repeated measures ANOVA with a 2,1 model to assess systematic error, SEM standard error of measurement