[논문]Effect of different protocols of caffeine intake on metabolism and endurance performance

Cox, Gregory R.; Desbrow, Ben; Montgomery, Paul G.; Anderson, Megan E.; Bruce, Clinton R.; Macrides, Theodore A.; Martin, David T.; Moquin, Angela; Roberts, Alan; Hawley, John A.; Burke, Louise M.

doi:10.1152/japplphysiol.00249.2002

Effect of different protocols of caffeine intake on metabolism and endurance performance

Journal of applied physiology, v.93 no.3, 2002년, pp.990 - 999

Cox, Gregory R. (Sports Science and Sports Medicine, Australian Institute of Sport, Belconnen, Australian Capital Territory 2616) , Desbrow, Ben , Montgomery, Paul G. (Sports Science and Sports Medicine, Australian Institute of Sport, Belconnen, Australian Capital Territory 2616) , Anderson, Megan E. , Bruce, Clinton R. (Centre for Sports Studies, University of Canberra, Bruce, Australian Capital Territory 2617) , Macrides, Theodore A. , Martin, David T. (Sports Science and Sports Medicine, Australian Institute of Sport, Belconnen, Australian Capital Territory 2616) , Moquin, Angela , Roberts, Alan (Exercise Metabolism Group, School of Medical Sciences, RMIT University, Bundoora, Victoria 3083) , Hawley, John A. (and) , Burke, Louise M. (Natural Products Unit, Department of Medical Laboratory Science, RMIT University, Melbourne, Victoria 3001, Australia)

Abstract ▼ AI-Helper

Competitive athletes completed two studies of 2-h steady-state (SS) cycling at 70% peak O2uptake followed by 7 kJ/kg time trial (TT) with carbohydrate (CHO) intake before (2 g/kg) and during (6% CHO drink) exercise. In Study A, 12 subjects received either 6 mg/kg caffeine 1 h preexercise (Precaf), 6 × 1 mg/kg caffeine every 20 min throughout SS (Durcaf), 2 × 5 ml/kg Coca-Cola between 100 and 120 min SS and during TT (Coke), or placebo. Improvements in TT were as follows: Precaf, 3.4% (0.2-6.5%, 95% confidence interval); Durcaf, 3.1% (−0.1-6.5%); and Coke, 3.1% (−0.2-6.2%). In Study B, eight subjects received 3 × 5 ml/kg of different cola drinks during the last 40 min of SS and TT: decaffeinated, 6% CHO (control); caffeinated, 6% CHO; decaffeinated, 11% CHO; and caffeinated, 11% CHO (Coke). Coke enhanced TT by 3.3% (0.8-5.9%), with all trials showing 2.2% TT enhancement (0.5-3.8%; P < 0.05) due to caffeine. Overall, 1) 6 mg/kg caffeine enhanced TT performance independent of timing of intake and 2) replacing sports drink with Coca-Cola during the latter stages of exercise was equally effective in enhancing endurance performance, primarily due to low intake of caffeine (∼1.5 mg/kg).

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Effect of different protocols of caffeine intake on metabolism and endurance performance

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