Rantanen T, Sipilä S, Suominen H
Department of Health Sciences, University of Jyväskylä, Finland.
Eur J Appl Physiol Occup Physiol. 1993;66(6):514-7. doi: 10.1007/BF00634301.
The association between a history of heavy work and muscle strength was studied among 51 physically active women aged 66-85 years trained in sports and 41 women aged 70-81 years selected randomly from the population register. Maximal isometric muscle strength of hand grip, arm flexion, leg extension and trunk flexion and extension were measured using specially constructed dynamometers. The capacity of the abdominal muscles was evaluated by means of a sit-up test. The study included an interview dealing with the subjects' histories of heavy manual employment. The mean histories of heavy work for the trained and untrained women were 24 and 36 years, respectively. The trained women showed significantly greater maximal isometric muscle strength and abdominal muscle capacity than the untrained women. Among the trained women there was no correlation between the amount of heavy work and muscle performance. Among the untrained women the amount of heavy work correlated positively with maximal isometric trunk extension strength. The results would suggest that among elderly women, whether physically active or not, a history of heavy work has no systematic association with muscle strength.
在51名年龄在66至85岁之间、接受过体育训练的身体活跃女性以及41名从人口登记册中随机挑选的年龄在70至81岁之间的女性中，研究了繁重工作史与肌肉力量之间的关联。使用特制的测力计测量了握力、手臂屈曲、腿部伸展以及躯干屈伸的最大等长肌肉力量。通过仰卧起坐测试评估腹肌的能力。该研究包括一次关于受试者繁重体力劳动史的访谈。受过训练和未受过训练的女性的平均繁重工作史分别为24年和36年。受过训练的女性比未受过训练的女性表现出明显更大的最大等长肌肉力量和腹肌能力。在受过训练的女性中，繁重工作量与肌肉表现之间没有相关性。在未受过训练的女性中，繁重工作量与最大等长躯干伸展力量呈正相关。结果表明，在老年女性中，无论是否身体活跃，繁重工作史与肌肉力量均无系统性关联。
