Muscle weakness, fatigue, and torque variability: effects of age and mobility status.
Muscle weakness, fatigue, and torque variability: effects of age and mobility status.
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DOI：
10.1002/mus.23903
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发表时间：
2014-02
期刊：
影响因子：
3.4
通讯作者：
Buonaccorsi, John P.
中科院分区：
文献类型：
--
作者：
Kent-Braun, Jane A.;Callahan, Damien M.;Fay, Jessica L.;Foulis, Stephen A.;Buonaccorsi, John P.
Whereas deficits in muscle function, particularly power production, develop in old age and are risk factors for mobility impairment, a complete understanding of muscle fatigue during dynamic contractions is lacking. We tested hypotheses related to torque-producing capacity, fatigue resistance, and variability of torque production during repeated maximal contractions in healthy older, mobility-impaired older, and young women. Knee extensor fatigue (decline in torque) was measured during 4 min of dynamic contractions. Torque variability was characterized using a novel 4-component logistic regression model. Young women produced more torque at baseline and during the protocol than older women (P < 0.001). Although fatigue did not differ between groups (P = 0.53), torque variability differed by group (P = 0.022) and was greater in older impaired compared with young women (P = 0.010). These results suggest that increased torque variability may combine with baseline muscle weakness to limit function, particularly in older adults with mobility impairments.
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DOI：
10.1007/bf03339897
发表时间：
2000-04-01
期刊：
AGING-CLINICAL AND EXPERIMENTAL RESEARCH
影响因子：
--
作者：
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通讯作者：
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影响因子：
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影响因子：
2.5
作者：
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通讯作者：
ENOKA, RM
DOI：
10.1093/gerona/52a.5.b267
发表时间：
1997-09-01
影响因子：
5.1
作者：
Metter, EJ;Conwit, R;Fozard, JL
通讯作者：
Fozard, JL
DOI：
10.1152/ajpcell.1997.272.2.c638
发表时间：
1997-02-01
影响因子：
5.5
作者：
Larsson, L;Li, XP;Frontera, WR
通讯作者：
Frontera, WR