Document Detail


Consumption of dietary caffeine and coffee in physically active populations: physiological interactions.
MedLine Citation:
PMID:  19088792     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Caffeine is a proven ergogenic aid, increasing athletic performance, endurance, and mental chronometry at doses as low as 1-3 mg.kg-1. As coffee is a readily available and commonly ingested form of caffeine, the two are often equated. However, coffee also contains hundreds of other biologically active compounds, many of which are metabolically distinct from caffeine. The purpose of this review was to examine the prevalence of coffee and (or) caffeine consumption among elite Canadian athletes, and to delineate the effects of coffee and caffeine on physical activity, weight maintenance, performance, and metabolism. A total of 270 self-reported 3-day food records were examined for caffeine intake from athletes registered with Canadian Sport Centres in 2005 and 2006. Athletes ranged in age from 16-45 years, and competed in 38 different sports. Results showed that 30% of athletes ingested >1 mg.kg-1.day-1 from a variety of sources. Average daily intake was 0.85 +/- 13 mg.kg-1. Caffeine intake was not correlated with any 1 sport; the 10 highest caffeine users were athletes from 9 different sports, including skill, endurance, and power sports. No differences were noted for average caffeine ingestion between summer and winter sports. High caffeine intakes corresponded to coffee ingestion, with the 25 highest individual intakes (193-895 mg.day-1) from coffee drinkers. In summary, it can be concluded that the majority of high-level Canadian athletes consume dietary caffeine primarily in the form of coffee. However, levels consumed are insufficient to elicit performance enhancement. Potential detrimental effects of caffeine consumption on exercise performance include gastric upset, withdrawal, sleep disturbance, and interactions with other dietary supplements.
Authors:
Jasmine M Tunnicliffe; Kelly Anne Erdman; Raylene A Reimer; Victor Lun; Jane Shearer
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Applied physiology, nutrition, and metabolism = Physiologie appliquée, nutrition et métabolisme     Volume:  33     ISSN:  1715-5312     ISO Abbreviation:  -     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-12-17     Completed Date:  2009-03-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101264333     Medline TA:  Appl Physiol Nutr Metab     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  1301-10     Citation Subset:  IM    
Affiliation:
Roger Jackson Center for Health and wellness, Faculty of Kinesiology, University of Calgary, Calgary, Canada. jmtunnic@ucalgary.ca
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Athletic Performance / physiology*
Caffeine / administration & dosage,  pharmacology*
Canada
Central Nervous System Stimulants / administration & dosage,  pharmacology*
Coffee*
Diet / methods*
Female
Food-Drug Interactions / physiology
Humans
Male
Middle Aged
Motor Activity / physiology*
Sports*
Young Adult
Chemical
Reg. No./Substance:
0/Central Nervous System Stimulants; 0/Coffee; 58-08-2/Caffeine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Coffee, glucose homeostasis, and insulin resistance: physiological mechanisms and mediators.
Next Document:  Does caffeine alter muscle carbohydrate and fat metabolism during exercise?