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A Typical Start….
Caffeine is the most widely used psychoactive substance in the world…
Coffee
Costill et al. (1978)Bellet et al. (1968)
Urine Caffeine Concentration (2004 – 2015)
Aguilar-Navarro et al. (2019)
Grgic et al. (2019)
How it Works…
There are downsides…
Poole and Tordof (2017)
Graham and Spriet
(1995)
Another Potential Issue…
Wednesday 25 January 2017
500 g277 cups!
Liguori et al. (1997)
Coffee vs. Caffeine
Coffee vs. Caffeine
Hodgson et al. (2013)Graham et al. (1998)
Coffee vs. Caffeine
Richardson and Clarke (2016)
COF DEC PLA
Methods
Results
Results
Conclusion
However…
Results
Conclusion
Considerations
Caution!
Ali et al. (2015)
What Next?
• Investigating the effects of coffee ingestion on aerobic and anaerobicperformance
• To explore the optimal doses of coffee for exercise performance futuredose–response studies are needed
• It remains unclear what the optimal pre-exercise ingestion time is
• The effect of training status remains equivocal
• Exercise performance responses following caffeine ingestion may beinfluenced by the level of habitual caffeine consumption and genetic factors
Take Home Message
Caffeine ingestion is effective for enhancing endurance, high-intensityand intermittent exercise performance when consumed in low-to-moderate dosages (~3-6 mg·kg-1). The literature is equivocal whenconsidering the effects of caffeine supplementation on strength-powerperformance, and additional research in this area is warranted. Coffeeproviding 3-5 mg·kg-1 of caffeine may be an useful alternative toanhydrous caffeine for improving sport performance. Some of thediscrepancies in results are possibly due to differences training status ofthe participants. Performance does not appear to be influencedby habitual caffeine consumption. The scientific literature does notsupport caffeine-induced diuresis during exercise.
Acknowledgments