Paxton S J, Trinder J, Shapiro C M, Adam K, Oswald I, Gräf K J
Sleep. 1984;7(4):339-46. doi: 10.1093/sleep/7.4.339.
The study assessed the effect of physical fitness and body composition on sleep and the nighttime secretion of the hormones, human growth hormone (hGH), prolactin, and cortisol. Two groups of 17 subjects, one of fit athletes and the other of unfit nonathletes, were selected so that the groups were matched for weight, height, lean body mass (LBM), and fat levels. Subjects slept in a sleep laboratory for 3 nonconsecutive nights: 1 adaptation night and 2 experimental nights. On 1 experimental night blood samples were collected; on the other, baseline sleep was assessed and the catheter was not inserted. Weight and height were measured and LBM assessed by 24 h urinary creatinine. The effect of physical fitness was tested by a comparison of the two groups; body composition was assessed by correlation analyses. Physical fitness did not have a significant effect on either sleep or hormone levels, although in the latter case the results were marginal. In contrast, body composition was related to both sleep and hGH. Percentage LBM was negatively correlated with slow-wave sleep and positively correlated with hGH levels. These results were significant for all subjects combined and for the fit group, although not the unfit group alone.
该研究评估了身体素质和身体成分对睡眠以及激素（人类生长激素（hGH）、催乳素和皮质醇）夜间分泌的影响。选取了两组各17名受试者，一组是身体健康的运动员，另一组是身体不健康的非运动员，两组在体重、身高、瘦体重（LBM）和脂肪水平方面进行了匹配。受试者在睡眠实验室连续三个晚上：1个适应夜和2个实验夜。在一个实验夜采集血样；另一个实验夜评估基础睡眠且不插入导管。测量体重和身高，通过24小时尿肌酐评估瘦体重。通过两组比较测试身体素质的影响；通过相关分析评估身体成分。身体素质对睡眠或激素水平均无显著影响，尽管在后一种情况下结果接近显著。相比之下，身体成分与睡眠和hGH均相关。瘦体重百分比与慢波睡眠呈负相关，与hGH水平呈正相关。这些结果对所有受试者以及健康组均具有显著性，尽管单独对不健康组不具有显著性。
