impact of prior coffee consumption on the subsequent ergogenic effect of anhydrous caffeine

• Published in: International journal of sport nutrition and exercise metabolism Vol. 14; no. 6; pp. 698 - 708
• Main Authors: McLellan, T.M, Bell, D.G
• Format: Journal Article
• Language: English
• Published: United States 01.12.2004
• Subjects: Administration, Oral; Adult; Bicycling - physiology; Caffeine - administration & dosage; Coffee - chemistry; Cross-Over Studies; Dose-Response Relationship, Drug; Female; Humans; Male; Oxygen Consumption; Physical Endurance - drug effects; Physical Endurance - physiology; Physical Exertion - drug effects; Physical Exertion - physiology; Time Factors
• ISSN: 1526-484X; 1543-2742
• DOI: 10.1123/ijsnem.14.6.698

This study examined whether the prior consumption of coffee (COF) decreased the ergogenic effect of the subsequent ingestion of anhydrous caffeine (CAF). Thirteen subjects performed 6 rides to exhaustion at 80% VO2max 1.5 h after ingesting combinations of COF, decaffeinated coffee (DECOF), CAF, or placebo. The conditions were DECOF + placebo (A), DECOF + CAF (5 mg/kg) (B), COF (1.1 mg/kg caffeine) + CAF (5 mg/kg) (C), COF + CAF (3 mg/kg) (D), COF + CAF (7 mg/kg) (E), and colored water + CAF (5 mg/kg) (F). Times to exhaustion were significantly greater for all trials with CAF versus placebo (trial A). Exercise times (in minutes) were: 21.7 +/- 8.1, 29.0 +/- 7.4, 27.8 +/- 10.8, 25.1 +/- 7.9, 26.4 +/- 8.0 and 26.8 +/- 8.1 for trials A through F, respectively. In conclusion, the prior consumption of COF did not decrease the ergogenic effect of the subsequent ingestion of anhydrous CAF.