Nonexercise movement in elderly compared with young people
Nonexercise movement in elderly compared with young people
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DOI：
10.1152/ajpendo.00509.2006
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发表时间：
2007-04-01
影响因子：
5.1
通讯作者：
Levine, James A.
中科院分区：
文献类型：
--
作者：
Harris, Ann M.;Lanningham-Foster, Lorraine M.;Levine, James A.
自由生活的日常活动和衰老之间的联系尚不清楚，因为非运动运动及其能量等价物，非运动活动产热，还没有在老年人中进行详尽的研究。我们想解决的假设，即自由生活的非运动运动是较低的老年人相比，年轻的控制相匹配的瘦体重。10名瘦，健康，久坐的老年人和10名年轻受试者的瘦体重相匹配的非运动的运动和身体姿势进行了测量超过10天，使用敏感，验证技术。此外，使用双标记水和间接量热法评估能量消耗。老年受试者的总非运动运动（加速度任意单位）、站立时间和站立加速度显著较低;这特别是因为老年人每天行走的距离较短，尽管与年轻人相比每天行走的次数相似。基础代谢率、食物热效应、每日总能量消耗和非运动产热的能量消耗在老年组和青年组之间没有差异。因此，老年人走路的能量消耗可能比年轻人大。精瘦、健康的老年人可能有一种生物驱动力，使他们比年轻人更不活跃。
The association between free-living daily activity and aging is unclear because nonexercise movement and its energetic equivalent, nonexercise activity thermogenesis, have not been exhaustively studied in the elderly. We wanted to address the hypothesis that free-living nonexercise movement is lower in older individuals compared with younger controls matched for lean body mass. Ten lean, healthy, sedentary elderly and 10 young subjects matched for lean body mass underwent measurements of nonexercise movement and body posture over 10 days using sensitive, validated technology. In addition, energy expenditure was assessed using doubly labeled water and indirect calorimetry. Total nonexercise movement ( acceleration arbitrary units), standing time, and standing acceleration were significantly lower in the elderly subjects; this was specifically because the elderly walked less distance per day despite having a similar number of walking bouts per day compared with the young individuals. The energetic cost of basal metabolic rate, thermic effect of food, total daily energy expenditure, and nonexercise activity thermogenesis were not different between the elderly and young groups. Thus, the energetic cost of walking in the elderly may be greater than in the young. Lean, healthy elderly individuals may have a biological drive to be less active than the young.