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Table 1 Cycling performance indicators during the 20-km time trials, after acute ingestion of CAF (n=13) or PLA (n=13). Values are expressed as meanstandard deviation

From: Performance during a 20-km cycling time-trial after caffeine ingestion

 

Condition

 

Variables

PLA

CAF

P

Power (watts)

206.9 ± 28.5

204.6 ± 43.9

0.79

Speed (km.h–1)

33.5 ± 1.8

33.3 ± 2.8

0.72

Cadence (rpm)

105.3 ± 8.4

103.4 ± 4.1

0.96

HR (beats.min–1)

171 ± 9.9

171 ± 8.0

0.94

Duration (s)

2191 ± 157.6

2181 ± 193.9

0.61

% difference (IC 90%)

–10.1 (–45 to 24.9)

% difference positive/trivial/negative

2/85/12

Qualitative Inference

Unclear

  1. CAF=caffeine; PLA=placebo.