PHYSICAL-TRAINING IN ELDERLY MEN WITH SPECIAL REFERENCE TO QUADRICEPS MUSCLE STRENGTH AND MORPHOLOGY
PHYSICAL-TRAINING IN ELDERLY MEN WITH SPECIAL REFERENCE TO QUADRICEPS MUSCLE STRENGTH AND MORPHOLOGY
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DOI：
10.1111/j.1475-097x.1981.tb00876.x
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发表时间：
1981-01-01
期刊：
影响因子：
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通讯作者：
GUSTAFSSON, E
中科院分区：
文献类型：
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作者：
ANIANSSON, A;GUSTAFSSON, E
12名69-74岁无心血管或运动症状的男性每周进行3次身体训练，包括下肢力量训练，持续12周。仅将体重用作阻力。认为该年龄组的培训强度适中。训练后，在次最大负荷下心率显着降低，这表明训练计划具有调节作用。随着训练的进行，股四头肌的静态和动态（等速）肌力显著增加。肌肉活检获得股外侧肌纤维，毛细血管和酶活性分析。训练后的纤维组成发生了变化，II型纤维的比例明显较高，这主要是由于II A型纤维的增加。IIA型纤维的相对面积随着训练而显著增加。总体细胞质量或毛细血管化无变化。还有训练适应的酶证据，肌激酶活性显著增加。得出的结论是，老化的人类骨骼肌仍然是可训练的，并且训练反应与年轻年龄组相似。
Physical training, including strength training of the lower extremities, was performed three times per week for 12 weeks by twelve 69–74‐year‐old men with no cardiovascular or locomotor symptoms. Only body weight was used as resistance. The training was considered to be moderately intense for this age‐group. After training, the heart rate was significantly lower at submaximal loads, demonstrating a conditioning effect of the training programme. The static and dynamic (isokinetic) muscle strength in the quadriceps muscle increased significantly with the training. Muscle biopsies were obtained from the vastus lateralis muscle for fibre, capillary and enzyme activity analysis. The fibre composition was altered after training, with a significantly higher proportion of Type II fibres, mainly due to an increase of Type II A fibres. The relative area of the Type IIA fibres increased significantly with training. There was no change in total body cell mass or capillarization. There was also enzymatic evidence of training adaptation, with a significant increment in myokinase activity. It is concluded that the ageing human skeletal muscle remains trainable and that the training response is similar to that seen in younger age‐groups.