Institute of Sport Pedagogy and Coaching Sciences, Centre of Behavioral, Social and Health Sciences, University of Tartu, 18. Ülikooli St., 50090 Tartu, Estonia.
Eur J Appl Physiol. 2011 Jun;111(6):1027-34. doi: 10.1007/s00421-010-1730-1. Epub 2010 Nov 19.
The aim of this investigation was to examine the effects of menstrual cycle phase on substrate oxidation and lactate concentration during exercise. Eleven eumenorrheic female rowers (18.4 ± 1.9 years; 172.0 ± 4.0 cm; 67.2 ± 8.4 kg; 27.7 ± 4.8% body fat) completed 1 h rowing ergometer exercise at 70% of maximal oxygen consumption (VO(2max)) during two different phases of the menstrual cycle: the follicular phase (FP) and the luteal phase (LP). Resting and exercise measurements of the whole body energy expenditure, oxygen consumption (VO(2)), respiratory exchange ratio (RER), substrate oxidation and lactate blood levels were made. Energy expenditure, VO(2) and heart rate during the 1-h exercise were not significantly different (P > 0.05) among menstrual cycle phases. Resting RER and RER during the entire 1 h exercise period were not significantly different among menstrual cycle phases. There was an increase (P < 0.05) in RER in the transition between rest and exercise and a further increase in RER occurred after the first 30 min of exercise at both menstrual cycle phases. Blood lactate concentrations significantly increased in the transition between rest and exercise and remained relatively constant during the whole 1 h of exercise in both menstrual cycle phases. No menstrual cycle phase effect (P > 0.05) was observed for blood lactate concentrations. In conclusion, our results demonstrated no effect of menstrual cycle phase on substrate oxidation and blood lactate concentration during rowing exercise at 70% of VO(2max) in athletes. Normally menstruating female rowers should not be concerned about their menstrual cycle phase with regard to substrate oxidation in everyday training.
本研究旨在探讨月经周期阶段对运动中底物氧化和乳酸浓度的影响。11 名月经正常的女性赛艇运动员（18.4 ± 1.9 岁；172.0 ± 4.0cm；67.2 ± 8.4kg；27.7 ± 4.8%体脂）在月经周期的两个不同阶段完成了 1 小时 70%最大摄氧量（VO(2max)）的划船测功仪运动：卵泡期（FP）和黄体期（LP）。休息和运动时测量全身能量消耗、氧气消耗（VO(2)）、呼吸交换率（RER）、底物氧化和乳酸血液水平。1 小时运动中的能量消耗、VO(2)和心率在月经周期阶段之间没有显著差异（P > 0.05）。休息时和整个 1 小时运动期间的 RER 在月经周期阶段之间没有显著差异。在休息和运动之间的过渡期间，RER 增加（P < 0.05），并且在两个月经周期阶段的运动前 30 分钟后，RER 进一步增加。在休息和运动之间的过渡期间，血液乳酸浓度显著增加，并且在两个月经周期阶段的整个 1 小时运动期间保持相对恒定。血液乳酸浓度在月经周期阶段没有观察到影响（P > 0.05）。总之，我们的结果表明，在 70%VO(2max)的划船运动中，月经周期阶段对运动员的底物氧化和血液乳酸浓度没有影响。正常月经的女性赛艇运动员不应担心在日常训练中月经周期阶段对底物氧化的影响。
