Effect of caffeinated drinks on substrate metabolism, caffeine excretion, and performance.

@article{Kovacs1998EffectOC,
  title={Effect of caffeinated drinks on substrate metabolism, caffeine excretion, and performance.},
  author={Eva M. R. Kovacs and Stegen JHCH and Fred Brouns},
  journal={Journal of applied physiology},
  year={1998},
  volume={85 2},
  pages={
          709-15
        }
}
The effect of addition of different dosages of caffeine (Caf) to a carbohydrate-electrolyte solution (CES) on metabolism, Caf excretion, and performance was examined. Subjects (n = 15) ingested 8 ml/kg of water placebo (Pla-W), 7% CES (Pla-CES), or 7% CES with 150, 225, and 320 mg/l Caf (CES-150, CES-225, and CES-320, respectively) during a warm-up protocol (20 min) and 3 ml/kg at one-third and two-thirds of a 1-h time trial. Performance was improved with Caf supplementation: 62.5 +/- 1.3, 61.5… Expand
The effect of ad libitum ingestion of a caffeinated carbohydrate-electrolyte solution on urinary caffeine concentration after 4 hours of endurance exercise.
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It is concluded that ad libitum ingestion of a CES with 150 mg x L (-1) CAF during 4 h cycling resulted in post-exercise urinary concentration below the doping level in all subjects. Expand
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  • International journal of sport nutrition and exercise metabolism
  • 2004
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Prior consumption of COF did not decrease the ergogenic effect of the subsequent ingestion of anhydrous CAF, and times to exhaustion were significantly greater for all trials with CAF versus placebo. Expand
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Compared with glucose alone, 5 mg x kg(-1) x h (-1) of caffeine coingested with glucose increases exogenous CHO oxidation, possibly as a result of an enhanced intestinal absorption. Expand
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The present work did not yield any definitive physiological mechanisms for the performance findings, but data suggest that cyclists in the fed state should ingest carbohydrate and caffeine together to improve time trial performance. Expand
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The widely accepted notion that caffeine consumption acts chronically as a diuretic is questioned, as C0, C3, and C6 exhibited no evidence of hypohydration. Expand
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The coingestion of caffeine with CHO during exercise enhanced TT performance by 4.6% compared with CHO and 9.0%" compared with water placebo, however, caffeine did not influence exogenous CHO oxidation or glucose kinetics during SS exercise. Expand
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  • Medicine
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  • 2016
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It is suggested that the ingestion of a caffeinated carbohydrate solution before and during a badminton match can maintain serve accuracy, anticipation timing, and sprinting actions around the court. Expand
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