Influence of Menstrual Cycle or Hormonal Contraceptive Phase on Physiological Variables Monitored During Treadmill Testing

Frontiers in Physiology

Anthony C. Hackney²  Ritva S. Taipale-Mikkonen⁴  Anna Raitanen⁴  Heikki Peltonen⁴  Johanna K. Ihalainen⁴  Heikki Kyröläinen⁴  Maarit Valtonen⁵  Guro Strøm Solli⁶  Kerry McGawley⁸ 

[1] Department of Exercise and Sport Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States;Department of Nutrition, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States;Department of Sports Science and Physical Education, Nord University, Bodø, Norway;Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland;Research Institute for Olympic Sports (KIHU), Jyväskylä, Finland;School of Sport Sciences, UiT The Arctic University of Norway, Tromsø, Norway;Sports Technology Unit, Faculty of Sport and Health Sciences, University of Jyväskylä, Vuokatti, Finland;Swedish Winter Sports Research Centre, Department of Health Sciences, Mid Sweden University, Östersund, Sweden;

关键词: endurance testing;    menstrual cycle;    hormonal contraceptives;    aerobic testing;    female physiology;   

DOI  :  10.3389/fphys.2021.761760

来源: DOAJ

【 摘 要 】

Purpose: To examine the influence of menstrual cycle (MC) and hormonal contraceptive (HC) cycle phases on physiological variables monitored during incremental treadmill testing in physically active women (eumenorrheic, EUM = 16 and monophasic HC-users, CHC = 12).Methods: Four running tests to exhaustion were performed at bleeding, mid follicular (mid FOL)/active 1, ovulation/active 2, and mid luteal (mid LUT)/inactive. HC and MC phases were confirmed from serum hormones. Heart rate (HR), blood lactate (Bla), and V˙O2 were monitored, while aerobic (AerT) and anaerobic (AnaT) thresholds were determined. V˙O2peak, maximal running speed (RUNpeak), and total running time (RUNtotal) were recorded.Results: No significant changes were observed in V˙O2 or Bla at AerT or AnaT across phases in either group. At maximal effort, absolute and relative V˙O2peak, RUNpeak, and RUNtotal remained stable across phases in both groups. No significant fluctuations in HRmax were observed across phases, but HR at both AerT and AnaT tended to be lower in EUM than in CHC across phases.Conclusion: Hormonal fluctuations over the MC and HC do not systematically influence physiological variables monitored during incremental treadmill testing. Between group differences in HR at AerT and AnaT underline why HR-based training should be prescribed individually, while recording of MC or HC use when testing should be encouraged as phase may explain minor, but possibly meaningful, changes in, e.g., Bla concentrations or differences in HR response.

【 授权许可】

Unknown