Table 5.

Blood lactate before, during, and at the end of exercise at 80%V˙o 2max 1, 3, and 6 h after caffeine or placebo ingestion

Time1 h3 h6 h
CaffeinePlaceboCaffeinePlaceboCaffeinePlacebo
Nonusers (n = 8)
 Before exercise1.2 ± 0.35-153 5-151 0.9 ± 0.31.1 ± 0.45-151 0.9 ± 0.31.0 ± 0.45-151 0.8 ± 0.3
 10 min 80%V˙o 2max 5.7 ± 1.85-150 4.6 ± 1.75.0 ± 1.65.2 ± 1.85.2 ± 1.45.2 ± 1.8
 Exhaustion 80%V˙o 2max 7.3 ± 3.15-152 5.4 ± 2.76.8 ± 2.45-152 6.5 ± 2.76.5 ± 2.55-152 6.2 ± 2.5
Users (n = 11)
 Before exercise1.2 ± 0.45-153 5-151 0.8 ± 0.20.9 ± 0.45-151 0.6 ± 0.30.7 ± 0.25-151 0.6 ± 0.2
 10 min 80%V˙o 2max 5.4 ± 1.25-150 5.3 ± 1.75.5 ± 1.35-150 5.3 ± 1.45.6 ± 1.65-150 5.1 ± 1.5
 Exhaustion 80%V˙o 2max 7.3 ± 1.25-152 6.4 ± 1.67.2 ± 1.55-152 6.8 ± 1.77.2 ± 1.75-152 5.7 ± 1.4
  • Values are means ± SD (in mmol/l).

  • F5-150 Caffeine at 80%V˙o 2max > placebo at 80%V˙o 2max.

  • F5-151 Before exercise with caffeine > placebo.

  • F5-152 Caffeine exhaustion 80%V˙o 2max > placebo exhaustion 80%V˙o 2max.

  • F5-153 Before exercise at 1 h >3 h and 6 h.