Gender effect on beta-endorphin response to exercise
Gender effect on beta-endorphin response to exercise
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DOI：
10.1097/00005768-199812000-00003
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发表时间：
1998-12-01
期刊：
影响因子：
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通讯作者：
Brown, DA
中科院分区：
文献类型：
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作者：
Goldfarb, AH;Jamurtas, AZ;Brown, DA
目的：12名健康男性（26.4岁）和女性（26.8岁）在休息和在60和80% (V) dot O-2max下循环25分钟后进行比较，以确定性别和月经周期是否影响循环β -内啡肽浓度（BE）。方法：(V)超过点O-2max在一个循环计量器上测定，受试者按随机顺序完成运动。女性在月经周期的黄体期(L)和卵泡期(F)进行了测试，这是由她们的血液雌激素水平证实的。所有试验均于早上休息30分钟（吸收后12小时）后进行。前臂静脉留置静脉导管，静息、循环25分钟、恢复25分钟时采血。结果：在60%和80%强度的运动前，男性的静息BE相似，分别为5.27 +/- 0.43和5.30 +/- 0.33 pmol。分别毫升(1)。比O-2max点（6.54 +/- 0.33 pmol）高60% (V)时BE变化不显著。但比dot O-2max （11.90 +/- 1.98 pmol.mL(-1)）显著增加80% (V)。与F相比，女性在L期间的BE略低，但这没有达到显著性（L = 4.40 +/- 0.22, F = 4.73 +/- 0.30 pmol.mL(-1)）。以60% (V)比dot O-2max循环对L （5.41 +/- 0.42 pmol）的BE没有显著提高。mL(-1))和F（5.35±0.40 pmol.mL(-1)）。在点O-2max上方80% (V)循环时，L期和F期的BE分别增加了相似程度（10.44和10.96）。虽然女性的BE浓度比男性略低，为dot O-2max的80% (V)，但没有达到统计学意义。结论：这些数据表明，女性在80% (V)超过dot O-2max时，与男性有相似的BE反应，与月经周期无关。处于休息状态和运动强度较低的女性体内的BE水平可能略低于男性，与女性月经周期的时间无关。
Purpose: Twelve healthy men (26.4 yr) and women (26.8 yr) were compared at rest and after cycling for 25 min at 60 and 80% (V) over dot O-2max to determine whether gender and menstrual cycle influenced circulating beta-endorphin concentration (BE). Methods: (V) over dot O-2max was determined on a cycle ergometer, and subjects completed the exercise in a randomized order. Women were tested in both the luteal (L) and follicular (F) phases of their menstrual cycle, which was confirmed by their blood estrogen levels. All tests were conducted in the morning after a 30-min rest (12-h postabsorptive). An indwelling venous catheter placed in a forearm vein enabled blood sampling at rest, 25 min of cycling, and 25 min of recovery. Results: Resting BE was similar for men before both 60 and 80% intensities of exercise, 5.27 +/- 0.43 and 5.30 +/- 0.33 pmol.ml(-1), respectively. BE was not significantly changed at 60% (V) over dot O-2max (6.54 +/- 0.33 pmol.mL(-1)) but significantly increased at 80% (V) over dot O-2max (11.90 +/- 1.98 pmol.mL(-1)). Women tended to have slightly lower BE during the L compared with F, but this did not reach significance (L = 4.40 +/- 0.22, F = 4.73 +/- 0.30 pmol.mL(-1)). Cycling at 60% (V) over dot O-2max did not significantly increase BE in the L (5.41 +/- 0.42 pmol.mL(-1)) nor the F (5.35 +/- 0.40 pmol.mL(-1)). Cycling at 80% (V) over dot O-2max increased BE to a similar extent in both the L and F phase, respectively (10.44 and 10.96). Although the BE concentrations tended to be slightly lower in women compared with men at 80% (V) over dot O-2max this did not reach statistical significance. Conclusions: These data suggest that women cycling at 80% (V) over dot O-2max will have a similar BE response to men independent of their menstrual cycle. BE in women at rest and who exercise at lower exercise intensities may have slightly lower BE levels then men independent of the time of the women's menstrual cycle.