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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >A comparison of adductor pollicis fatigue in older men and women.
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A comparison of adductor pollicis fatigue in older men and women.

机译：老年男性和女性内收肌污染的比较。

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摘要

Sex differences in fatigue resistance of the adductor pollicis (AP) muscle were studied in 24 older adults who were divided into three groups: 12 older men (69.8 +/- 4.60 years), 6 older women not on hormone replacement therapy (HRT) (70.2 +/- 4.02 years), and 6 older women on HRT (68.7 +/- 6.47 years). Fatigue in the AP muscle was induced using an intermittent (5 s contraction, 5 s rest) submaximal voluntary contraction (50% of maximal voluntary contraction (MVC)) protocol, which was continued until exhaustion (i.e., when subjects could either no longer maintain a 5-s contraction at 50% MVC or when the MVC was deemed to be lower than the target force). There was no effect of HRT on MVC or time to fatigue (TTF); therefore, the older women were pooled as one subject group. At baseline, men were stronger than women for MVC (75.9 +/- 18.8 N in men vs. 56.8 +/- 10.0 N in women; P < 0.05) and evoked twitch force (7.3 +/- 1.7 N in men vs. 5.2 +/- 0.8 N in women; P < 0.05). There was no difference in TTF between men and women (14.77 +/- 7.06 min in men vs. 11.53 +/- 4.91 min in women; P > 0.20), nor was there a significant relationship between baseline muscle force and TTF (r = 0.14). There was also no difference in the pattern of fatigue and recovery between the men and women. These results suggest that there is no difference in endurance or fatigue characteristics of the AP muscle in men and women over the age of 65 years, and that baseline muscle force does not predict fatigue resistance in this muscle.
机译：研究了24名老年人的内收肌（AP）肌肉疲劳抵抗力的性别差异，将其分为三组：12名老年男性（69.8 +/- 4.60岁），6名未接受激素替代疗法（HRT）的老年女性（ 70.2 +/- 4.02岁）和6例HRT老年妇女（68.7 +/- 6.47岁）。使用间歇性（5 s收缩，5 s休息）次最大自愿收缩（最大自愿收缩（MVC）的50％）诱发AP肌肉疲劳，该方案持续进行至疲惫（即受试者无法再维持）在MVC为50％时或当MVC低于目标力时收缩5秒）。 HRT对MVC或疲劳时间（TTF）无影响;因此，将老年妇女归为一个主题组。在基线时，男性的MVC强度比女性强（男性为75.9 +/- 18.8 N，女性为56.8 +/- 10.0 N; P <0.05）和诱发的抽搐力（男性为7.3 +/- 1.7 N对5.2）女性+/- 0.8 N; P <0.05）。男女之间的TTF没有差异（男性为14.77 +/- 7.06分钟，女性为11.53 +/- 4.91分钟; P> 0.20），基线肌肉力量和TTF之间也没有显着关系（r = 0.14）。男女之间的疲劳和恢复方式也没有差异。这些结果表明，65岁以上的男性和女性的AP肌肉的耐力或疲劳特性没有差异，并且基线肌肉力量不能预测该肌肉的疲劳抵抗力。

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