Table 2—

FFA, insulin, and C-peptide concentrations during the euglycemic clamp

Lean
Obese
Type 2 diabetes
Pretraining
Posttraining
Pretraining
Posttraining
Pretraining
Posttraining
Baseline3 hBaseline3 hBaseline3 hBaseline3 hBaseline3 hBaseline3 h
FFAs (μmol/l)
    Placebo631 ± 240201 ± 60*574 ± 165199 ± 50*589 ± 175186 ± 59*533 ± 369231 ± 152*517 ± 166226 ± 92*550 ± 132197 ± 52*
    Caffeine557 ± 257210 ± 85*568 ± 166230 ± 18*580 ± 138287 ± 171*575 ± 157249 ± 72*627 ± 139306 ± 102*660 ± 319251 ± 93*
Insulin (μU/ml)
    Placebo7 ± 471 ± 13*6 ± 169 ± 18*8 ± 855 ± 21*7 ± 365 ± 11*10 ± 451 ± 17*10 ± 558 ± 13*
    Caffeine6 ± 373 ± 10*7 ± 272 ± 16*12 ± 1147 ± 14*8 ± 462 ± 14*7 ± 450 ± 11*10 ± 456 ± 12*
C-peptide (ng/ml)
    Placebo1.5 ± 0.61.4 ± 0.51.6 ± 0.41.9 ± 0.72.3 ± 0.71.7 ± 1.01.2 ± 1.01.3 ± 1.12.5 ± 1.11.4 ± 0.62.6 ± 0.61.6 ± 0.8
    Caffeine1.6 ± 0.61.5 ± 0.91.9 ± 1.11.8 ± 0.72.1 ± 0.61.5 ± 0.91.4 ± 1.21.4 ± 1.22.4 ± 0.51.1 ± 0.52.4 ± 1.51.7 ± 0.6
  • Data are means ± SD.

  • *

    * P < 0.05 vs. baseline;

  • P = 0.013 vs. pretraining, 3 h.