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… 
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Highly Influential Citations
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The effect of ad libitum ingestion of a caffeinated carbohydrate-electrolyte solution on urinary caffeine concentration after 4 hours of endurance exercise.

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.

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

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  • Medicine
    International journal of sport nutrition and exercise metabolism
  • 2004
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.

Effect of various carbohydrate-electrolyte fluids on cycling performance and maximal voluntary contraction.

Performance increases during CE+ may have been influenced by lower RPE and greater preservation of leg strength during exercise in part as a result of the hypothesized effects of CE+ on the central nervous system and skeletal muscle.

Caffeine increases exogenous carbohydrate oxidation during exercise.

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.

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

Overall, 6 mg/kg caffeine enhanced TT performance independent of timing of intake and replacing sports drink with Coca-Cola during the latter stages of exercise was equally effective in enhancing endurance performance.

Fluid, electrolyte, and renal indices of hydration during 11 days of controlled caffeine consumption.

The widely accepted notion that caffeine consumption acts chronically as a diuretic is questioned, as C0, C3, and C6 exhibited no evidence of hypohydration.

Caffeine and carbohydrate supplementation during exercise when in negative energy balance: effects on performance, metabolism, and salivary cortisol.

When co-ingested with carbohydrate, caffeine increased fat use and decreased nonmuscle glycogen carbohydrate use over carbohydrate alone when participants are in negative energy balance; however, caffeine had no effect on the 20 km cycling time trial performance.

Substrate metabolism and exercise performance with caffeine and carbohydrate intake.

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.

Effect of Carbohydrate and Caffeine Ingestion on Badminton Performance.

  • N. ClarkeM. Duncan
  • Medicine
    International journal of sports physiology and performance
  • 2016
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.

The effects of caffeine ingestion on time trial cycling performance.

It is concluded that performance was improved possibly based upon a greater reliance on fat metabolism, as indicated by increased FFA and a lower respiratory exchange ratio (RER).
...

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