Journal article
Women Experience the Same Ergogenic Response to Caffeine as Men
Medicine and Science in Sports and Exercise, Vol.51(6), pp.1195-1202
2019
Abstract
Purpose: This study aimed to determine if 1) consumption of caffeine improves endurance cycling performance in women, and 2) sex differences exist in the magnitude of the ergogenic and plasma responses to caffeine supplementation. Methods: Twenty-seven (11 women and 16 men) endurance-trained cyclists and triathletes participated in this randomized, double-blind, placebo-controlled, crossover study. Participants completed an incremental exercise test to exhaustion, two familiarization trials and two performance trials. Ninety minutes prior to the performance trials participants ingested opaque capsules containing either 3 mg.kg-1 body mass of anhydrous caffeine or a placebo. They then completed a set amount of work (75% of peak sustainable power output) in the fastest possible time. Plasma was sampled at baseline, pre- and post-exercise for caffeine. Strict standardization and verification of diet, hydration, training volume and intensity, and for women, contraceptive hormone phase was implemented. Results: Performance time was significantly improved following caffeine administration in women (placebo: 3863±419s, caffeine: 3757±312s; p=0.03) and men (placebo: 3903±341s, caffeine: 3734±287s; p<;.001). The magnitude of performance improvement was similar for women [4.3% (0.4-8.2%); mean (95% CI)] and men [4.6% (2.3-6.8%)]. Plasma caffeine concentrations were similar between sexes before exercise, but significantly greater in women after exercise (p<0.001). Conclusions: Ingestion of 3 mg.kg-1 body mass of caffeine enhanced endurance exercise performance in women. The magnitude of the performance enhancement observed in women was similar to that of men, despite significantly greater plasma caffeine concentrations following exercise in women. These results suggest the current recommendations for caffeine intake (i.e. 3-6 mg.kg-1 caffeine prior to exercise to enhance endurance performance), which are derived almost exclusively from studies on men, may also be applicable to women
Details
- Title
- Women Experience the Same Ergogenic Response to Caffeine as Men
- Authors
- Tina L Skinner (Author) - University of QueenslandBen Desbrow (Author) - Griffith UniversityJulia Arapova (Author) - University of QueenslandMia A Schaumberg (Author) - University of the Sunshine Coast - School of Health & Sport SciencesJohn Osborne (Author) - University of QueenslandGary D Grant (Author) - Griffith UniversityShailendra Anoopkumar-Dukie (Author) - Griffith UniversityMichael D Leveritt (Author) - University of Queensland
- Publication details
- Medicine and Science in Sports and Exercise, Vol.51(6), pp.1195-1202
- Publisher
- Lippincott Williams & Wilkins
- Date published
- 2019
- DOI
- 10.1249/MSS.0000000000001885
- ISSN
- 0195-9131; 0195-9131
- Copyright note
- Copyright © 2019 Lippincott Williams & Wilkins. Reproduced in accordance with the publisher policy. This is a non-final version of an article published in final form in Medicine & Science in Sports & Exercise. 51(6):1195-1202, 2019 DOI: 10.1249/MSS.0000000000001885
- Organisation Unit
- School of Health - Biomedicine; School of Health; University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health and Behavioural Sciences - Legacy
- Language
- English
- Record Identifier
- 99451361302621
- Output Type
- Journal article
- Research Statement
- false
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