The effects of menstrual cycle phase on acute critical power testing performance in healthy females.

IF 2.7 3区医学 Q2 PHYSIOLOGY

European Journal of Applied Physiology Pub Date : 2025-09-29 DOI:10.1007/s00421-025-06000-z

Kelly E Joniak, Sam R Moore, Alex N Ladan, Morgan E Britton, Elena I Cantu, Brad W Wilkins, Abbie E Smith-Ryan

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引用次数: 0

Abstract

Aim: Critical power (CP) is derived from the hyperbolic relationship between power output and time to exhaustion (TTE) and delineates severe-intensity exercise from the heavy-intensity domain. Fluctuations in endogenous and exogenous female sex hormones may influence this power-duration relationship.

Purpose: This study examined CP and subjective fatigue between low-hormonal (LHP) and high-hormonal (HHP) phases of the menstrual cycle (MC) in eumenorrheic (EUM), intrauterine device (IUD), and oral contraceptive (OC) using females.

Methods: Thirty-five participants (mean ± SD: age: 24.3 ± 6.1 yrs, weight: 65.2 ± 7.0 kg) completed a randomized crossover design. Performance outcomes (CP [W], anaerobic work capacity [W´; J], TTE [sec], and total work [J]) were evaluated from three TTE trials at 110%, 80%, and 95% of peak oxygen consumption. Subjective feelings of fatigue, sleepiness, consciousness, and energy were obtained from validated questionnaires.

Results: CP (LHP-HHP; Δ ± SE: 0.81 ± 1.87 W), W´ (Δ -295.44 ± 415.04 J), TTE (Δ: 110%: -7.98 ± 6.16 s; 95%: 1.21 ± 9.44 s; 80%: - 52.63 ± 25.80 s), total work (Δ: - 8,022 ± 4,590 J), and energy (Δ: - 1.69 ± 8.45 a.u) were not significantly different between MC phases. Greater subjective fatigue (LHP-HHP; Δ: - 5.69 ± 12.08 a.u; p = 0.009), sleepiness (Δ: - 3.34 ± 9.70 a.u; p = 0.049), and consciousness (Δ: - 0.86 ± 2.1 a.u; p = 0.024) were identified in HHP.

Conclusion: These data suggest that MC phase does not alter parameters of the power-duration relationship in recreationally active females, but subjective feelings of fatigue may be altered during the high-hormone phase of the MC.

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月经周期阶段对健康女性急性临界功率测试成绩的影响。

目的：从功率输出与疲劳时间（TTE）之间的双曲关系推导出临界功率（CP），并从高强度领域描述了高强度运动。内源性和外源性女性性激素的波动可能影响这种权力-持续时间关系。目的：本研究探讨了女性痛经（EUM）、宫内节育器（IUD）和口服避孕药（OC）患者月经周期（MC）低激素（LHP）和高激素（HHP）阶段的CP和主观疲劳。方法：35例受试者（平均±SD：年龄：24.3±6.1岁，体重：65.2±7.0 kg）完成随机交叉设计。性能结果（CP [W]、无氧功容量[W´；J]、TTE [sec]和总功[J]）在峰值耗氧量110%、80%和95%时进行了三次TTE试验。主观感觉疲劳，困倦，意识，和能量从有效的问卷。结果:CP (LHP-HHP;Δ±SE: 0.81±1.87 W), W´(Δ-295.44±415.04 J), TTE(Δ:110%:-7.98±6.16;95%:1.21±9.44;80%:- 52.63±25.80 s),总功(Δ:- 8022±4590 J)和能源(Δ:- 1.69±8.45 a.u) MC之间没有显著的不同阶段。HHP患者主观疲劳（LHP-HHP； Δ： - 5.69±12.08 a.u; p = 0.009）、嗜睡（Δ： - 3.34±9.70 a.u; p = 0.049）和意识（Δ： - 0.86±2.1 a.u; p = 0.024）明显加重。结论：这些数据表明，在娱乐活动的女性中，MC期并没有改变能量-持续时间关系的参数，但MC的高激素期可能会改变主观疲劳感觉。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

European Journal of Applied Physiology 医学-生理学

CiteScore

6.00

自引率

6.70%

发文量

227

审稿时长

3 months

期刊介绍： The European Journal of Applied Physiology (EJAP) aims to promote mechanistic advances in human integrative and translational physiology. Physiology is viewed broadly, having overlapping context with related disciplines such as biomechanics, biochemistry, endocrinology, ergonomics, immunology, motor control, and nutrition. EJAP welcomes studies dealing with physical exercise, training and performance. Studies addressing physiological mechanisms are preferred over descriptive studies. Papers dealing with animal models or pathophysiological conditions are not excluded from consideration, but must be clearly relevant to human physiology.