Cullinen K, Caldwell M
Rhode Island Department of Health, Division of Family Health, Providence 02908, USA.
J Am Diet Assoc. 1998 Apr;98(4):414-8. doi: 10.1016/S0002-8223(98)00094-7.
To examine the effects of a weight training program on the resting metabolic rate, fat-free mass, strength, and dietary intake of untrained young women.
A 12-week weight training program was completed by 20 previously untrained women aged 19 through 44 years.
Twenty-three study subjects and 14 control subjects were recruited on a volunteer basis. Twenty study subjects and 10 control subjects completed the study.
Study subjects participated in a 12-week moderate-intensity, progressive resistance weight training program consisting of 2 supervised sessions per week with 6 types of lifting exercises per session. Resting metabolic rate, fat-free mass, strength, and dietary intake were measured before and immediately after the study.
Repeated measures analysis of variance and t tests (unequal variance and paired) were used to determine interaction effects and differences within and between groups.
The study group increased their fat-free mass (mean+/-standard deviation) from 44.2+/-5.4 kg to 46.2+/-6.0 kg (P<.001). Elbow flexion, elbow extension, and knee flexion strength all increased from 28.9+/-5.3 to 34.5+/-3.8, 16.9+/-4.9 to 22.1+/-5.3, and 39.5+/-8.6 to 48.6+/-7.3 ft-lb, respectively (P<.001). Percent body fat decreased from 29.8+/-2.8 to 27.2+/-2.6 (P<.001) without a significant change in body weight. Resting metabolic rate did not change significantly (P>.05).
A moderate-intensity weight training program increased strength and fat-free mass and decreased body fat in normal-weight young women. Favorable changes in body composition were obtained without restricting food intake. The increase in fat-free mass did not increase resting metabolic rate significantly.
研究重量训练计划对未经训练的年轻女性静息代谢率、去脂体重、力量和饮食摄入的影响。
20名年龄在19至44岁之间、之前未经训练的女性完成了一项为期12周的重量训练计划。
23名研究对象和14名对照对象通过自愿招募。20名研究对象和10名对照对象完成了研究。
研究对象参加了一项为期12周的中等强度渐进性抗阻重量训练计划，每周进行2次有监督的训练，每次训练有6种举重练习。在研究开始前和结束后立即测量静息代谢率、去脂体重、力量和饮食摄入。
采用重复测量方差分析和t检验（方差不等和配对）来确定组内和组间的交互作用及差异。
研究组的去脂体重（均值±标准差）从44.2±5.4千克增加到46.2±6.0千克（P<0.001）。肘部屈曲、肘部伸展和膝关节屈曲力量分别从28.9±5.3增加到34.5±3.8、从16.9±4.9增加到22.1±5.3、从39.5±8.6增加到48.6±7.3英尺磅（P<0.001）。体脂百分比从29.8±2.8降至27.2±2.6（P<0.001），体重无显著变化。静息代谢率无显著变化（P>0.05）。
中等强度的重量训练计划可增强正常体重年轻女性的力量和去脂体重，并减少体脂。在不限制食物摄入的情况下，身体成分得到了有利变化。去脂体重的增加并未显著提高静息代谢率。
