Caffeine As an Ergogenic Aid

Keisler, Brian D.; Armsey, Thomas D.

doi:10.1097/01.csmr.0000306510.57644.a7

Cited by 61 publications

(42 citation statements)

References 19 publications

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“…Caffeine ingestion has been shown to enhance performance in physical tasks requiring aerobic endurance and muscular performance (38). This is in part due to its impact on the central nervous system (CNS) (39) through adenosine inhibition (40). In particular, adenosine increases in muscle and plasma during muscular activity and also in the brain during 'stress', negatively influencing neuron excitability and synapse transmission (40).…”

Section: Discussionmentioning

confidence: 99%

“…This is in part due to its impact on the central nervous system (CNS) (39) through adenosine inhibition (40). In particular, adenosine increases in muscle and plasma during muscular activity and also in the brain during 'stress', negatively influencing neuron excitability and synapse transmission (40). Thus, antagonism of adenosine may facilitate exercise performance.…”

Section: Discussionmentioning

confidence: 99%

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The effect of caffeine ingestion on functional performance in older adults

Duncan

Clarke

Tallis

et al. 2014

The Journal of nutrition, health and aging

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Caffeine is a widely used nutritional supplement which has been shown to enhance both physical and cognitive performance in younger adults.However, few studies have assessed the effect of caffeine ingestion on performance, particularly functional performance in older adults. The present study aims to assess the effect of acute caffeine ingestion on functional performance, manual dexterity and readiness to invest effort in older adults.Methods: 19 apparently healthy, volunteers (10 females and 9 males aged 61-79; 66±2 years) performed tests of functional fitness and manual dexterity post ingestion of caffeine (3mg*kg -1 ) or placebo in a randomised order. Pre and 60 minutes post ingestion, participants also completed measures of readiness to invest physical (RTIPE) and mental (RTIME) effort. Results: A series of repeated measures ANOVAS indicated enhanced performance in the following functional fitness tests; arm curls (P = .04), 8 foot up and go (P = .007), six minute walk (P = .016). Manual dexterity was also improved in the presence of caffeine (P = .001). RTIME increased (P = .015) pre to post ingestion in the caffeine condition but not in the placebo condition. There were no significant main effects or interactions for RTIPE or gender in any analysis (all P>.05). Conclusions: The results of this study suggest that acute caffeine ingestion positively enhances functional performance, manual dexterity and readiness to invest effort in apparently healthy older adults.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The effect of caffeine ingestion on functional performance in older adults

Duncan

Clarke

Tallis

et al. 2014

The Journal of nutrition, health and aging

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“…Recent reviews conclude that the primary mode of caffeine's action for improvements in performance involve adenosine-receptor antagonism in the CNS (Graham, 2001;Keisler & Armsey, 2006;Paluska, 2003). As a result, caffeine counteracts the inhibitory effects of adenosine on neuroexcitability, neurotransmitter release, and arousal (Davis et al, 2003).…”

Section: Potential Mechanismsmentioning

confidence: 99%

Effect of Various Carbohydrate-Electrolyte Fluids on Cycling Performance and Maximal Voluntary Contraction

Ganio¹,

Klau²,

Lee³

et al. 2010

International Journal of Sport Nutrition and Exercise Metabolism

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The purpose of this study was to compare the effects of a carbohydrate-electrolyte plus caffeine, carnitine, taurine, and B vitamins solution (CE+) and a carbohydrate-electrolyte-only solution (CE) vs. a placebo solution (PLA) on cycling performance and maximal voluntary contraction (MVC). In a randomized, double-blind, crossover, repeated-measures design, 14 male cyclists (M ± SD age 27 ± 6 yr, VO 2max 60.4 ± 6.8 ml · kg -1 · min -1 ) cycled for 120 min submaximally (alternating 61% ± 5% and 75% ± 5% VO 2max ) and then completed a 15-min performance trial (PT). Participants ingested CE+, CE, or PLA before (6 ml/kg) and every 15 min during exercise (3 ml/kg). MVC was measured as a single-leg isometric extension (70° knee flexion) before (pre) and after (post) exercise. Rating of perceived exertion (RPE) was measured throughout. Total work accumulated (KJ) during PT was greater (p < .05) in CE+ (233 ± 34) than PLA (205 ± 52) but not in CE (225 ± 39) vs. PLA. MVC (N) declined (p < .001) from pre to post in PLA (988 ± 213 to 851 ± 191) and CE (970 ± 172 to 870 ± 163) but not in CE+ (953 ± 171 to 904 ± 208). At Minutes 60, 90, 105, and 120 RPE was lower in CE+ (14 ± 2, 14 ± 2, 12 ± 1, 15 ± 2) than in PLA (14 ± 2, 15 ± 2, 14 ± 2, 16 ± 2; p < .001). CE+ resulted in greater total work than PLA. CE+, but not PLA or CE, attenuated pre-to-post MVC declines. 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.

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“…It was also reported that metabolic effects of caffeine under resting conditions consist of a temporary increase of calorie consumption [19,22,29]. Although some authors claimed that caffeine might significantly augment fat oxidation and energy consumption during prolonged activities at low or moderate intensities (below 60% ‡O 2 max) [6,11,13], other studies did not confirm those findings [10,35].…”

Section: Introductionmentioning

confidence: 99%

Effect of caffeine on metabolic and cardiovascular responses to submaximal exercise in lean and obese men

Damirchi

Farhad

Mirzaie

et al. 2009

Biomedical Human Kinetics

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SummaryStudy aim: To compare the effects of caffeine on metabolic and cardiovascular responses to exercise in lean and obese subjects. Material and methods: In a double blind random design, 6 lean (BMI<20) and 6 obese (BMI>28) sedentary young men performed treadmill running for 30 min at similar exercise intensities (60% ‡O 2 max) one hour after caffeine (5 mg/kg body mass) or placebo ingestion. Gas exchange was measured by indirect calorimetry/open-circuit spirometry. Heart rate (HR) was measured throughout the exercise. Blood pressure (BP) measurements were taken at baseline, 1 h after caffeine/placebo ingestion and immediately after exercise. Repeated measures ANOVA was used in data analysis. Results: Caffeine significantly (p<0.05 -0.01) increased the exercise-induced oxygen uptake, energy expenditure, systolic blood pressure and heart rate in both groups, the respiratory exchange ratio remaining unchanged. The effects of caffeine were in both groups alike. Conclusions: Caffeine activates metabolism without inducing major changes in fat/carbohydrate oxidation. The differences in body fat content seem not to affect the caffeine-induced effects in a submaximal exercise.

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Caffeine As an Ergogenic Aid

Cited by 61 publications

References 19 publications

The effect of caffeine ingestion on functional performance in older adults

The effect of caffeine ingestion on functional performance in older adults

Effect of Various Carbohydrate-Electrolyte Fluids on Cycling Performance and Maximal Voluntary Contraction

Effect of caffeine on metabolic and cardiovascular responses to submaximal exercise in lean and obese men

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