Young A, Stokes M, Round J M, Edwards R H
Eur J Clin Invest. 1983 Oct;13(5):411-7. doi: 10.1111/j.1365-2362.1983.tb00122.x.
Seventeen volunteers performed unilateral strength-training of the quadriceps with high-resistance, low-repetition, dynamic exercise, thrice weekly for an average of 5 weeks. Both before and after the training period, bilateral measurements were made of isometric quadriceps strength, quadriceps cross-sectional area (by ultrasound scanning), and thigh circumference. There were no significant changes in the untrained thighs. The trained quadriceps increased their isometric strength by more than they changed their cross-sectional area (mean increments = 15% and 6% respectively). Quadriceps hypertrophy was underestimated by measurements of thigh circumference and could not be predicted from them. We conclude that studies of localized muscle growth require direct measurements of the size of the muscle(s) concerned. Nevertheless, these may still underestimate the improvements in strength produced by high-resistance training.
17名志愿者进行了股四头肌的单侧高强度、低重复次数的动态力量训练，每周三次，平均持续5周。在训练期前后，均对双侧股四头肌的等长力量、股四头肌横截面积（通过超声扫描）和大腿围度进行了测量。未训练的大腿没有显著变化。训练后的股四头肌等长力量增加幅度大于其横截面积的变化幅度（平均增幅分别为15%和6%）。通过大腿围度测量低估了股四头肌的肥大情况，且无法据此进行预测。我们得出结论，局部肌肉生长的研究需要直接测量相关肌肉的大小。然而，这些测量仍可能低估高强度训练所产生的力量改善情况。
