Poehlman E T, Viers H F, Detzer M
Department of Medicine, College of Medicine, University of Vermont, Burlington 05405.
Can J Physiol Pharmacol. 1991 Mar;69(3):320-6. doi: 10.1139/y91-049.
An understanding of the physiological and behavioral determinants of resting energy requirements is important to nutritional considerations in females. We examined the influence of endurance training and self-reported dietary restraint on resting metabolic rate and fasting plasma hormones in 44 nonobese females characterized for body composition, maximal aerobic power (VO2 max), and daily energy intake. To examine the association of metabolic rate and dietary restraint with hormonal status, fasting plasma levels of insulin, glucose, and thyroid hormones (total and free fractions of thyroxine and triiodothyronine) were determined. In univariate analysis, resting metabolic rate (kcal.min-1) was positively related to VO2 max (L.min-1) (r = 0.54; p less than 0.01). This relationship, however, was partially dependent on body size, since fat-free mass was also related to resting metabolic rate (r = 0.42; p less than 0.01) and VO2 max (L.min-1) (r = 0.75; p less than 0.01). After controlling for fat-free weight using partial correlation analysis, the relation between RMR and VO2 max was weaker but controlling for fat-free weight using partial correlation analysis, the relation between RMR and VO2 max was weaker but still significant (partial r = 0.38; p less than 0.05). On the other hand, high levels of dietary restraint were associated with higher levels of body fat (r = 0.31; p less than 0.05) and a lower resting metabolic rate (r = -0.29; p = 0.07). These associations persisted after control for differences in fat-free mass. Total energy intake as well as total and free levels of triiodothyronine were not related to resting metabolic rate or level of dietary restraint.(ABSTRACT TRUNCATED AT 250 WORDS)
了解静息能量需求的生理和行为决定因素对于女性的营养考量非常重要。我们研究了耐力训练和自我报告的饮食节制对44名非肥胖女性静息代谢率和空腹血浆激素的影响，这些女性的身体成分、最大有氧能力（VO2 max）和每日能量摄入量均有特征描述。为了研究代谢率和饮食节制与激素状态的关联，测定了空腹血浆中胰岛素、葡萄糖和甲状腺激素（甲状腺素和三碘甲状腺原氨酸的总分数和游离分数）的水平。在单变量分析中，静息代谢率（千卡·分钟-1）与VO2 max（升·分钟-1）呈正相关（r = 0.54；p小于0.01）。然而，这种关系部分取决于身体大小，因为去脂体重也与静息代谢率（r = 0.42；p小于0.01）和VO2 max（升·分钟-1）（r = 0.75；p小于0.01）相关。使用偏相关分析控制去脂体重后，RMR与VO2 max之间的关系变弱，但仍然显著（偏r = 0.38；p小于0.05）。另一方面，高水平的饮食节制与较高的体脂水平（r = 0.31；p小于0.05）和较低的静息代谢率（r = -0.29；p = 0.07）相关。在控制去脂体重差异后，这些关联仍然存在。总能量摄入量以及三碘甲状腺原氨酸的总分数和游离分数与静息代谢率或饮食节制水平无关。（摘要截断于250字）
