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Table 1 Performance variables recorded in each experimental group

From: Effects of caffeine supplementation on physical performance and mood dimensions in elite and trained-recreational athletes

  Elite Recreational p-values (ES)
Supplementation Group Supplementation x Group
Wmax Caffeine 10.85 ± 0.48 11.52 ± 0.62 0.003** (0.44) 0.009** (0.36) 0.431 (0.04)
  Placebo 10.19 ± 0.59 11.11 ± 0.8
Wavg Caffeine 8.69 ± 0.38 8.8 ± 0.67 0.001**(0.53) 0.378 (0.07) 0.290 (0.05)
  Placebo 8.25 ± 0.37 8.54 ± 0.51
Wmin Caffeine 6.49 ± 0.22 6.01 ± 1.1 0.452 (0.04) 0.345 (0.06) 0.422 (0.04)
  Placebo 6.19 ± 0.56 6.02 ± 0.89    
T Wmax Caffeine 8.00 ± 1.6 7.2 ± 1.55 <0.001*** (0.57) 0.783 (0.05) 0.077 (0.18)
  Placebo 8.88 ± 1.64 9.3 ± 1.49    
  1. Data are provided as the mean ± standard deviation. Adjusted values for the test statistic (F) and degrees of freedom (df) are shown when inequality of variances were found between groups
  2. Abbreviations: ES: effect size; Wmax: maximum power; Wavg: average power; Wmin: minimum power; T Wmax: time to maximum power
  3. **: p < 0.01; ***: p < 0.001