Birch K M, Reilly T
Department of Exercise and Sport Science, Crewe and Alsager Faculty, Manchester Metropolitan University, Cheshire, England.
Can J Appl Physiol. 1997 Apr;22(2):148-60. doi: 10.1139/h97-012.
Cyclic variations in physiological and endocrinological baselines are known to be consistent with the eumenorrheic (healthy) menstrual cycle. The aim of this study was to examine the interaction of these variations with the physiological responses to repeated lifting. Sixteen females visited the laboratory in each of five phases of their menstrual cycle. During each visit, subjects performed a repetitive lifting task, lifting a weighted box, from knee to shoulder height, at six repetitions per minute for 10 min. Oxygen consumption, minute ventilation, heart rate (HR), and perceived exertion were monitored throughout the task. The variation in physiological and subjective responses to lifting with menstrual cycle phase did not reach statistical significance (p > .05). However, the HR response to lifting was elevated by approximately 10 beats x min-1 in the postovulatory phases of the cycle (effect size > 0.61). Although the impact of the menstrual cycle upon lifting performance is minimal, alterations in HR must be taken into account in determining new international standards for manual handling.
生理和内分泌基线的周期性变化已知与正常月经周期（健康月经周期）一致。本研究的目的是检验这些变化与重复提举的生理反应之间的相互作用。16名女性在月经周期的五个阶段分别到访实验室。每次到访时，受试者执行一项重复提举任务，将一个加重箱子从膝盖举到肩部高度，每分钟重复6次，持续10分钟。在整个任务过程中监测耗氧量、分钟通气量、心率（HR）和自觉用力程度。随着月经周期阶段的不同，提举的生理和主观反应变化未达到统计学显著性（p>0.05）。然而，在月经周期的排卵后期，提举的心率反应升高了约10次/分钟（效应大小>0.61）。尽管月经周期对提举表现的影响很小，但在确定新的手动搬运国际标准时，必须考虑心率的变化。
