STRENGTH TRAINING INCREASES RESTING METABOLIC-RATE AND NOREPINEPHRINE LEVELS IN HEALTHY 50-YR-OLD TO 65-YR-OLD MEN
STRENGTH TRAINING INCREASES RESTING METABOLIC-RATE AND NOREPINEPHRINE LEVELS IN HEALTHY 50-YR-OLD TO 65-YR-OLD MEN
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DOI：
10.1063/1.357118
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发表时间：
1994-01-01
影响因子：
3.3
通讯作者：
GOLDBERG, A
中科院分区：
文献类型：
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作者：
PRATLEY, R;NICKLAS, B;GOLDBERG, A
静息代谢率（RMR）随着年龄的增长而下降，主要是因为年龄相关的无脂肪质量（FFM）下降。我们假设，一个力量训练计划能够引起FFM的增加也会增加老年人的RMR。为了验证这一假设，RMR，身体成分，和某些激素的血浆浓度已知影响RMR之前和之后的16周重阻力力量训练计划在13名健康男性50-65岁。通过三次重复最大测试评估的平均力量水平随着训练增加了40%（P < 0.001）。体重没有变化，但体脂减少（25.6 +/- 1.5 vs. 23.7 +/- 1.7%; P < 0.001），FFM增加（60.6 +/- 2.2 vs. 62.2 +/- 2.1 kg; P < 0.01）。通过间接量热法测量的RMR在力量训练后增加了7.7%（6，449 +/- 217 vs. 6，998 +/- 226 kJ/24 h; P < 0.01）。即使以每公斤FFM表示RMR，这种增加仍然很显著。力量训练使动脉化血浆去甲肾上腺素水平增加36%（1.1 +/- 0.1对1.5 +/- 0.1 nmol/l; P < 0.01），但不改变空腹血糖、胰岛素或甲状腺激素水平。这些结果表明，一个重阻力力量训练计划增加RMR在健康的老年男性，可能是通过增加FFM和交感神经系统的活动。
Resting metabolic rate (RMR) decreases with age, largely because of an age-related decline in fat-free mass (FFM). We hypothesized that a strength-training program capable of eliciting increases in FFM would also increase RMR in older individuals. To test this hypothesis, RMR, body composition, and plasma concentrations of certain hormones known to affect RMR were measured before and after a 16-wk heavy-resistance strength-training program in 13 healthy men 50-65 yr of age. Average strength levels, assessed by the three-repetition maximum test, increased 40% with training (P < 0.001). Body weight did not change, but body fat decreased (25.6 +/- 1.5 vs. 23.7 +/- 1.7%; P < 0.001) and FFM increased (60.6 +/- 2.2 vs. 62.2 +/- 2.1 kg; P < 0.01). RMR, measured by indirect calorimetry, increased 7.7% with strength training (6,449 +/- 217 vs. 6,998 +/- 226 kJ/24 h; P < 0.01). This increase remained significant even when RMR was expressed per kilogram of FFM. Strength training increased arterialized plasma norepinephrine levels 36% (1.1 +/- 0.1 vs. 1.5 +/- 0.1 nmol/l; P < 0.01) but did not change fasting glucose, insulin, or thyroid hormone levels. These results indicate that a heavy-resistance strength-training program increases RMR in healthy older men, perhaps by increasing FFM and sympathetic nervous system activity.