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Ergogenic effects of caffeine on peak aerobic cycling power during the menstrual cycle.

Authors
  • Lara, Beatriz1
  • Gutiérrez-Hellín, Jorge1, 2
  • García-Bataller, Alberto3
  • Rodríguez-Fernández, Paloma4
  • Romero-Moraleda, Blanca1
  • Del Coso, Juan5
  • 1 Exercise Physiology Laboratory, Camilo José Cela University, Madrid, Spain. , (Spain)
  • 2 Faculty of Health Sciences, Universidad Francisco de Vitoria, Pozuelo, Spain. , (Spain)
  • 3 Faculty of Physical Activity and Sport Sciences, Universidad Politécnica de Madrid, Madrid, Spain. , (Spain)
  • 4 Centre for Sport Studies, Rey Juan Carlos University, Fuenlabrada, Spain. , (Spain)
  • 5 Centre for Sport Studies, Rey Juan Carlos University, Fuenlabrada, Spain. [email protected] , (Spain)
Type
Published Article
Journal
European Journal of Nutrition
Publisher
Springer-Verlag
Publication Date
Sep 01, 2020
Volume
59
Issue
6
Pages
2525–2534
Identifiers
DOI: 10.1007/s00394-019-02100-7
PMID: 31691019
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Recent investigations have established that the ingestion of a moderate dose of caffeine (3-6 mg kg-1) can increase exercise and sports performance in women. However, it is unknown whether the ergogenicity of caffeine is similar during all phases of the menstrual cycle. The aim of this investigation was to determine the ergogenic effects of caffeine in three phases of the menstrual cycle. Thirteen well-trained eumenorrheic triathletes (age = 31 ± 6 years; body mass = 58.6 ± 7.8 kg) participated in a double-blind, cross-over, randomised experimental trial. In the (1) early follicular (EF); (2) preovulation (PO); (3) and mid luteal (ML) phases, participants either ingested a placebo (cellulose) or 3 mg kg-1 of caffeine in an opaque and unidentifiable capsule. After a 60-min wait for substance absorption, participants performed an incremental maximal cycle ergometer test until volitional fatigue (25 W/min) to assess peak aerobic cycling power (Wmax). In comparison to the placebo, caffeine increased Wmax in the EF (4.13 ± 0.69 vs. 4.24 ± 0.71 W kg-1, Δ = 2.7 ± 3.3%, P = 0.01), in the PO (4.14 ± 0.70 vs. 4.27 ± 0.73 W kg-1, Δ = 3.3 ± 5.0%; P = 0.03) and in the ML (4.15 ± 0.69 vs. 4.29 ± 0.67 W kg-1, Δ = 3.6 ± 5.1%; P = 0.01) phases. The magnitude of the caffeine ergogenic effect was similar during all of the menstrual cycle phases (P = 0.85). Caffeine increased peak aerobic cycling power in the early follicular, preovulatory, and mid luteal phases. Thus, the ingestion of 3 mg of caffeine per kg of body mass might be considered an ergogenic aid for eumenorrheic women during all three phases of the menstrual cycle.

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