Succi Pasquale J, Benitez Brian, Kwak Minyoung, Mitchinson Clara J, Butterfield Timothy A, Samaan Michael A, Clasey Jody L, Bergstrom Haley C
Department of Kinesiology and Health Promotion, University of Kentucky, 1210 University Drive, Lexington, KY, 40526, USA.
Department of Athletic Training & Clinical Nutrition, University of Kentucky, Lexington, KY, USA.
Eur J Appl Physiol. 2025 Jan 7. doi: 10.1007/s00421-024-05698-7.
The purpose of this study was to examine the sex-specific influence of expected exercise duration on the physiological responses to RPE-clamp exercise anchored to RPE 15 with participants being deceived into believing the RPE-clamp exercise would last for 20-, 30-, or 40-min, but all trials were 30-min.
Twelve males and 12 females completed a graded exercise test followed by randomly ordered RPE-clamp trials at RPE15 on the Borg 6-20 scale where subjects were deceived into expecting exercise to last for either 20-, 30-, or 40-min, but the actual duration for each trial was 30-min. Separate 2 (Sex [Male vs. Female]) × 3 (Deception [20-min, 30-min, 40-min]) × 11 (Time [0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30 min]) mixed model analyses of variance (ANOVAs) with appropriate follow-up ANOVAs, and Bonferroni-corrected pairwise comparisons, were used to examine changes in volume of oxygen uptake ( ), heart rate (HR), respiration rate (RR), power output, and muscle oxygen saturation (%SmO).
Females, but not males, demonstrated lower power outputs when expected duration was 40-min compared to 20-min after approximately half of the exercise bout. , regardless of Sex, was also lower when expected duration was 40-min (62.47 ± 5.59% ) compared to 20-min (66.35 ± 5.79% ). There was no effect of expected duration on HR, RR, or %SmO, but females demonstrated significantly higher HR (86.06 ± 5.93%HR) and RR (74.81 ± 7.26%RR) compared to males (79.52 ± 4.96%HR; 62.31 ± 5.80%RR).
RPE-clamp exercise performance in females, but not males, may be influenced by the expectation of exercise duration.
本研究旨在探讨预期运动时长对以主观用力程度（RPE）15为锚定的RPE钳夹运动生理反应的性别特异性影响。研究中，参与者被误导认为RPE钳夹运动将持续20、30或40分钟，但所有试验实际均为30分钟。
12名男性和12名女性完成了一次分级运动试验，随后在Borg 6 - 20量表上进行以RPE15为标准的随机排序的RPE钳夹试验，受试者被误导认为运动将持续20、30或40分钟，但每次试验的实际时长均为30分钟。采用2（性别[男性与女性]）×3（误导[20分钟、30分钟、40分钟]）×11（时间[0、3、6、9、12、15、18、21、24、27、30分钟]）混合模型方差分析（ANOVA）以及适当的后续ANOVA和Bonferroni校正的成对比较，以检验摄氧量（ ）、心率（HR）、呼吸频率（RR）、功率输出和肌肉氧饱和度（%SmO）的变化。
在运动约一半时间后，与预期持续20分钟相比，预期持续40分钟时，女性的功率输出较低，而男性则无此现象。无论性别如何，预期持续40分钟时的 （62.47±5.59% ）也低于预期持续20分钟时（66.35±5.79% ）。预期持续时间对HR、RR或%SmO没有影响，但女性的HR（86.06±5.93%HR）和RR（74.81±7.26%RR）显著高于男性（79.52±4.96%HR；62.31±5.80%RR）。
女性而非男性的RPE钳夹运动表现可能受运动持续时间预期的影响。
