Catecholamine release, growth hormone secretion, and energy expenditure during exercise vs. recovery in men
Catecholamine release, growth hormone secretion, and energy expenditure during exercise vs. recovery in men
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DOI：
10.1152/jappl.2000.89.3.937
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发表时间：
2000-09-01
影响因子：
3.3
通讯作者：
Weltman, A
中科院分区：
文献类型：
--
作者：
Pritzlaff, CJ;Wideman, L;Weltman, A
我们研究了能量消耗（千卡）与肾上腺素（Epi）、去甲肾上腺素（NE）和生长激素（GH）释放之间的关系。10名男性[年龄：26岁;身高：178 cm;体重：81 kg;乳酸阈值（LT）时的O-2摄取量：36.3 ml.kg（-1）.min（-1）;峰值O-2摄取量：49.5 ml.kg（-1）.min（-1）]在6个随机顺序的场合进行测试[对照组，5次运动：在LT和休息之间差异的25%和75%时（0.25 LT，0.75 LT），LT，以及LT和峰值（1.25 LT，1.75 LT）之间差异的25%和75%（0900-0930）]。从07：00至13：00，采集血液并测定GH、Epi和NE。运动期间的碳水化合物（CHO）消耗和恢复期间的脂肪消耗与运动强度的增加成比例上升（P = 0.002）。运动期间的脂肪消耗和恢复期间的CHO消耗不受运动强度的影响。运动强度与运动期间CHO消耗之间的关系无法用Epi（P = 1.00）或NE（P = 0.922）来解释，而恢复期间脂肪消耗随着Epi和GH的增加而增加，与运动强度无关（P = 0.028）。当恢复期Epi和GH与脂肪消耗回归时，只有GH仍有统计学意义（P < 0.05）。我们的结论是，运动强度和运动期间的CHO支出和恢复期间的脂肪支出之间存在正相关关系，并且在恢复期间，随着运动强度的增加，脂肪支出的增加与GH的释放有关。
We examined the relationship between energy expenditure (in kcal) and epinephrine (Epi), norepinephrine (NE), and growth hormone (GH) release. Ten men [age, 26 yr; height, 178 cm; weight, 81 kg; O-2 uptake at lactate threshold (LT), 36.3 ml.kg(-1).min(-1); peak O-2 uptake, 49.5 ml.kg(-1).min(-1)] were tested on six randomly ordered occasions [control, 5 exercise: at 25 and 75% of the difference between LT and rest (0.25LT, 0.75LT), at LT, and at 25 and 75% of the difference between LT and peak (1.25LT, 1.75LT) (0900-0930)]. From 0700 to 1300, blood was sampled and assayed for GH, Epi, and NE. Carbohydrate (CHO) expenditure during exercise and fat expenditure during recovery rose proportionately to increasing exercise intensity (P = 0.002). Fat expenditure during exercise and CHO expenditure during recovery were not affected by exercise intensity. The relationship between exercise intensity and CHO expenditure during exercise could not be explained by either Epi (P = 1.00) or NE (P = 0.922), whereas fat expenditure during recovery increased with Epi and GH independently of exercise intensity (P = 0.028). When Epi and GH were regressed against fat expenditure during recovery, only GH remained statistically significant (P < 0.05). We conclude that a positive relationship exists between exercise intensity and both CHO expenditure during exercise and fat expenditure during recovery and that the increase in fat expenditure during recovery with higher exercise intensities is related to GH release.