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Table 4 Rating of perceived exertion (RPE) after all the procedures (Borg scale)

From: Dose-dependent effect of caffeine supplementation on judo-specific performance and training activity: a randomized placebo-controlled crossover trial

Indicator All Caffeine consumers Caffeine non-consumers U P r g
n = 22 n = 10 n = 12
RPE
 Baseline 13.8 (2.2) 14.3 (2.6) 13.4 (1.8) 45.00 0.34 −0.25
 3 mg/kg 14.2 (2.3) 14.5 (1.4) 13.9 (2.9) 50.50 0.55 −0.16
 6 mg/kg 13.6 (1.7) 13.7 (1.4) 13.5 (2.0) 59.50 1.00 0.01
 9 mg/kg 13.5 (1.3) 13.9 (1.3) 13.2 (1.3) 46.00 0.35 −0.23
 Placebo 13.0 (2.6) 13.6 (2.5) 12.6 (2.6) 47.00 0.41 −0.22
Χ2 3.22 3.16 1.46
P 0.52 0.53 0.83
 Kendall’s W 0.04 0.08 0.03
  1. Values are expressed as means (± SD). RPE, Rate of Perceived Exertion