Table 6.

Blood glucose 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)
 Before6-150exercise4.0 ± 1.03.5 ± 0.54.1 ± 0.23.9 ± 0.54.4 ± 0.63.5 ± 0.6
 10 min 80%V˙o 2max 4.0 ± 0.56-151 3.3 ± 0.33.7 ± 0.36-151 3.7 ± 0.63.8 ± 0.56-151 3.4 ± 0.3
 Exhasution 80%V˙o 2max 4.7 ± 1.06-151 3.9 ± 0.64.7 ± 0.76-151 4.2 ± 0.64.4 ± 0.76-151 4.1 ± 0.6
Users (n = 11)
 Before exercise3.4 ± 1.13.5 ± 1.43.4 ± 0.63.4 ± 0.73.5 ± 0.43.5 ± 0.4
 10 min 80%V˙o 2max 3.1 ± 0.56-151 3.2 ± 0.73.5 ± 0.56-151 3.3 ± 0.53.7 ± 0.56-151 3.4 ± 0.7
 Exhaustion6-151 80%V˙o 2max 4.3 ± 1.36-151 3.6 ± 0.94.7 ± 1.36-151 4.1 ± 0.84.2 ± 1.26-151 3.9 ± 1.1
  • Values are means ± SD (in mmol/l).

  • F6-150 Nonusers before exercise > users.

  • F6-151 Caffeine at 80%V˙o 2max > placebo at 80%V˙o 2max.