Musculoskeletal response to exercise is greatest in women with low initial values.
Musculoskeletal response to exercise is greatest in women with low initial values.
复制标题
初始值较低的女性对运动的肌肉骨骼反应最大。
DOI：
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发表时间：
2003
影响因子：
4.1
通讯作者：
C. Snow
中科院分区：
文献类型：
--
作者：
K. Winters;C. Snow
引言
运动训练的“初始值”原则指出，那些生理系统的初始值最低的人，对训练的反应有最大的改善能力。我们试图确定初始值是否可以预测绝经前妇女(N=31)的肌肉骨骼对训练的反应，她们参加了一项为期一年的抵抗和跳跃训练计划，旨在改善骨折风险的物理指标。在训练中，股骨粗隆骨密度(BMD)、髋外展肌力量、力量和姿势稳定性均有显著改善。
方法
为了确定初始值的预测能力，我们对每个变量进行了单独的逐步回归分析，包括以下因变量：年龄、初始值、训练期间最高举重和参加锻炼的总次数。
结果
在每种情况下，初始值都是对训练反应百分比变化的最显著预测因子。初始值解释了训练反应大小变化的15%-29%。对于每个较低的大转子骨密度单位(0.01g.cm-2)，训练反应增加12%。初始力量(1N.M)、功率(1W)和稳定性(1SI单位)每降低一个单位，训练反应分别增加1.0%、0.2%和8.0%。当按初始值的四分之一进行分类时，处于最低四分之一的女性在肌肉骨骼测量方面的改善是处于较高四分之一的女性的两到五倍。
结论
初值最低的女性在髋骨密度、髋外展肌力量、腿部力量和姿势稳定性方面有最大的改善。这些结果支持初始值的训练原则，并提示该训练方案可能在骨折风险的肌肉骨骼指数值较低的绝经前妇女中最为成功。
INTRODUCTION
The "initial values" principle of exercise training states those with the lowest initial values of a physiologic system have the greatest capacity for improvement in response to training. We sought to determine whether initial values predicted the musculoskeletal response to training in premenopausal women (N = 31) who participated in a 1-yr program of resistance and jump training designed to improve physical indices of fracture risk. Significant improvements in trochanteric bone mineral density (BMD), hip abductor strength, power, and postural stability occurred in response to training.
METHODS
To determine the predictive power of initial values, we performed separate stepwise regression analyses for each variable including the following dependent variables: age, initial value, highest weight lifted during training, and total number of exercise sessions attended.
RESULTS
In each case, the initial value was the most significant predictor of percent change in response to training. Initial values explained 15-29% of the variance in the magnitude of the training response. For each unit lower BMD of the greater trochanter (0.01 g.cm-2), the training response was 12% greater. For each unit decrease in initial strength (1 N.m), power (1 W), and stability (1 SI unit), the training response was 1.0%, 0.2%, and 8.0% greater, respectively. When categorized by quartile of initial values, women in the lowest quartile had two- to fivefold greater improvements in musculoskeletal measures than those in the upper quartile.
CONCLUSION
Women who began training with the lowest initial values had the greatest improvements in hip BMD, hip abductor strength, leg power, and postural stability. These results support the training principle of initial values and suggest that this training program may be most successful in premenopausal women with lower values of musculoskeletal indices of fracture risk.
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影响因子：
3.3
作者：
KOHRT, WM;MALLEY, MT;HOLLOSZY, JO
通讯作者：
HOLLOSZY, JO
影响因子：
3.3
作者：
Skinner, JS;Jaskólski, A;Bouchard, C
通讯作者：
Bouchard, C
DOI：
10.1097/00005768-200106001-00013
发表时间：
2001-06-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Bouchard, C;Rankinen, T
通讯作者：
Rankinen, T
影响因子：
3.3
作者：
Bouchard, C;An, P;Rao, DC
通讯作者：
Rao, DC