Poehlman E T, Melby C L, Badylak S F, Calles J
Department of Medicine, University of Vermont, Burlington 05405.
Metabolism. 1989 Jan;38(1):85-90. doi: 10.1016/0026-0495(89)90185-6.
Ambiguous findings have been reported in previous studies regarding the relationships among aerobic fitness, resting metabolic rate (RMR), and the thermic effect of a meal (TEM). We reexamined the association among these variables in young nonobese men who exhibited a wide range of aerobic fitness levels. RMR was measured after an overnight fast and TEM was assessed for three hours after ingestion of a liquid meal. Preprandial and postprandial plasma levels of insulin, glucose, and thyroid hormones (total T3 and T4) were measured. Daily energy intake was estimated from three-day food diaries, body composition from underwater weighing, and aerobic fitness from a test of VO2 max. Data were analyzed with linear and curvilinear regression analysis, as well as with ANOVA to test for differences among subjects classified by fitness level (ie, untrained, moderately, and highly trained). A significant correlation was found between RMR and VO2 max (r = .77, P less than .01). RMR adjusted for body weight and FFW was higher in highly trained men when compared to moderately and untrained individuals. However, a curvilinear relationship was found between TEM and VO2 max (P less than .05). Subjects who exhibited moderate levels of fitness showed the highest TEM, whereas a lower TEM was noted in untrained and highly trained men. These findings were observed in the absence of differences in plasma concentrations of total T3 and T4 among fitness levels. These findings suggest that highly trained men have a high RMR adjusted for their metabolic size.(ABSTRACT TRUNCATED AT 250 WORDS)
以往关于有氧适能、静息代谢率（RMR）和食物热效应（TEM）之间关系的研究结果并不明确。我们重新审视了这些变量在有氧适能水平范围广泛的年轻非肥胖男性中的关联。在禁食过夜后测量RMR，并在摄入流食后三小时评估TEM。测量餐前和餐后血浆中胰岛素、葡萄糖和甲状腺激素（总T3和T4）的水平。通过三日食物日记估计每日能量摄入，通过水下称重测量身体成分，通过最大摄氧量测试评估有氧适能。使用线性和曲线回归分析以及方差分析对数据进行分析，以检验按适能水平分类的受试者（即未训练、中度训练和高度训练）之间的差异。发现RMR与最大摄氧量之间存在显著相关性（r = 0.77，P < 0.01）。与中度训练和未训练的个体相比，高度训练男性经体重和去脂体重调整后的RMR更高。然而，发现TEM与最大摄氧量之间存在曲线关系（P < 0.05）。适能水平中等的受试者TEM最高，而未训练和高度训练的男性TEM较低。在不同适能水平之间血浆总T3和T4浓度无差异的情况下观察到了这些结果。这些结果表明，高度训练的男性经代谢体量调整后具有较高的RMR。（摘要截短为250字）
