Lynch N J, Nimmo M A
Scottish School of Sport Studies, University of Strathclyde, Glasgow, UK.
Eur J Appl Physiol Occup Physiol. 1998 Nov;78(6):565-72. doi: 10.1007/s004210050462.
Five women using low-dose, monophasic oral contraceptive (OC) agents (OC group) and ten normally menstruating women (Non-OC group) performed a treadmill protocol to determine the effect of OCs and the menstrual cycle (MC) on intermittent exercise performance and some commonly used metabolic markers. The Non-OC group were tested once in the mid-follicular phase (MFP) and once in the late luteal phase (LLP) of the MC, while the OC group performed their first test within 1 week of taking the OC (T1) and their second test 1 week later (T2). Despite performance time being the same in both groups [mean (SD), Non-OC group: 77.7 (14.9) s versus OC group: 77.7 (21.1)s], plasma ammonia concentration ([NH3]pl) was higher in the Non-OC group when compared to the OC group throughout recovery (P < 0.05). No differences were found in blood lactate (BLa), maximum heart rate or aural temperature (Tau) between groups. Within the Non-OC group Tau increased with exercise in both phases (P < 0.05), however Tau was higher in the LLP at rest [36.1 (0.3) degrees C) and 1 min post-exercise [37.1 (0.6) degrees C), when compared to the MFP [35.8 (0.3) and 36.9 (0.7) degrees C, rest and 1 min post-exercise respectively, P < 0.05]. Within the OC group T1 resulted in a higher peak BLa [11.2 (0.4) mmol/l] and [NH3]pl (143.0 (26.2) Umol/l] when compared to T2 [BLa, 9.6 (0.9); [NH3], 119.4 (48.1), P<0.05]. These results suggest that: (1) exercise performance does not vary between the MFP and the LLP of the MC, nor does it appear to be affected by the number of days using the OC, and (2) an altered metabolism occurs both between groups (Non-OC versus OC) and within the OC group.
五名使用低剂量单相口服避孕药（OC）的女性（OC组）和十名正常月经的女性（非OC组）进行了一项跑步机运动方案，以确定OC和月经周期（MC）对间歇运动表现及一些常用代谢指标的影响。非OC组在MC的卵泡中期（MFP）和黄体晚期（LLP）各测试一次，而OC组在开始服用OC后1周内进行首次测试（T1），1周后进行第二次测试（T2）。尽管两组的运动时间相同[平均值（标准差），非OC组：77.7（14.9）秒，OC组：77.7（21.1）秒]，但在整个恢复过程中，非OC组的血浆氨浓度（[NH3]pl）高于OC组（P<0.05）。两组之间的血乳酸（BLa）、最大心率或耳温（Tau）无差异。在非OC组中，两个阶段运动时Tau均升高（P<0.05），但与MFP相比，LLP在静息时[36.1（0.3）℃]和运动后1分钟[37.1（0.6）℃]时Tau更高[MFP静息和运动后1分钟分别为35.8（0.3）℃和36.9（0.7）℃，P<0.05]。在OC组中，与T2相比，T1时的BLa峰值[11.2（0.4）mmol/l]和[NH3]pl（143.0（26.2）μmol/l）更高[BLa，9.6（0.9）；[NH3]，119.4（48.1），P<0.05]。这些结果表明：（1）MC的MFP和LLP之间运动表现无差异，使用OC的天数似乎也未对其产生影响；（2）两组之间（非OC组与OC组）以及OC组内部均发生了代谢改变。
