运动引起的次日血糖改善所需的能量不足。
Energy Deficit Required for Exercise-induced Improvements in Glycemia the Next Day.
机构信息
Substrate Metabolism Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, MI.
出版信息
Med Sci Sports Exerc. 2020 Apr;52(4):976-982. doi: 10.1249/MSS.0000000000002211.
PURPOSE
This study determined the impact of an exercise-induced energy deficit on postprandial and 24 h glycemic control the day after a session of exercise.
METHODS
Fifteen healthy participants (m/f = 5/10, 27 ± 6 yr, body mass index = 24 ± 3 kg·m, peak oxygen consumption [V˙O2peak] = 36 ± 9 mL·kg·min) completed two separate 5-d experimental trials performed under "free-living" conditions. On day 1 of each trial, participants were fitted with a continuous glucose monitor and abstained from exercise. Day 2 served as a nonexercise control (NoEx). On day 3, participants exercised at 3:00 PM (65% V˙O2peak) until they expended 350 kcals (~45 min). The diet during both experimental trials was identical with the exception of meals after this exercise session. During one trial, the dinner after exercise did not replenish the 350 kcal expended during exercise, thereby establishing an exercise energy deficit (ExDEF). During the other experimental trial, the dinner after exercise contained an additional 350 kcal to compensate for the energy expended during exercise, and thereby maintained energy balance after exercise (ExBAL). Free-living glycemia was measured the day before exercise (NoEx) and the day after exercise under ExDEF and ExBAL conditions.
RESULTS
The day after exercise, 3 h postprandial area under the curve was lower after breakfast in ExDEF compared with ExBAL (16.0 ± 1.8 vs 17.0 ± 1.6 mmol·L·h per 3 h, P = 0.01), but did not differ between groups after lunch (P = 0.24), dinner (P = 0.39), or evening snack (P = 0.45). Despite differences in the glycemic response to breakfast, 24 h glycemia did not differ between ExDEF and ExBAL (area under the curve = 128 ± 10 vs 131 ± 10 mmol·L·h per 24 h, respectively; P = 0.54).
CONCLUSIONS
An exercise-induced energy deficit lowered the glycemic response to breakfast the next day-but this energy deficit did not impact total 24 h glycemia, the day after exercise in metabolically healthy adults.
目的
本研究旨在确定运动引起的能量不足对运动后次日餐后和 24 小时血糖控制的影响。
方法
15 名健康参与者（m/f=5/10，27±6 岁，体重指数=24±3kg·m，峰值摄氧量[V˙O2peak]=36±9mL·kg·min）在“自由生活”条件下完成了两次单独的 5 天实验。在每个试验的第 1 天，参与者佩戴连续血糖监测仪并避免运动。第 2 天作为非运动对照（NoEx）。第 3 天，参与者下午 3 点（65% V˙O2peak）运动至消耗 350 千卡（约 45 分钟）。两次实验期间的饮食相同，除了运动后的膳食。在一次试验中，运动后的晚餐没有补充运动中消耗的 350 千卡，从而形成运动能量不足（ExDEF）。在另一次实验中，运动后的晚餐含有额外的 350 千卡，以弥补运动中消耗的能量，从而在运动后保持能量平衡（ExBAL）。在运动前一天（NoEx）和运动后在 ExDEF 和 ExBAL 条件下测量自由生活血糖。
结果
运动后第 1 天，ExDEF 组早餐后 3 小时餐后曲线下面积低于 ExBAL 组（16.0±1.8 与 17.0±1.6mmol·L·h 每 3 小时，P=0.01），但午餐后（P=0.24）、晚餐后（P=0.39）和晚间小吃后（P=0.45）两组之间无差异。尽管早餐后血糖反应存在差异，但 ExDEF 和 ExBAL 之间 24 小时血糖无差异（曲线下面积分别为 128±10 与 131±10mmol·L·h 每 24 小时，P=0.54）。
结论
运动引起的能量不足降低了第二天早餐后的血糖反应，但在代谢健康的成年人中，这种能量不足不会影响运动后 24 小时总血糖。
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