Dahlbäck G O, Norlin R
Eur J Appl Physiol Occup Physiol. 1985;54(1):67-70. doi: 10.1007/BF00426301.
Mechanical efficiency, heart rate, blood lactate, and some other variables were studied in six children with cerebral palsy who walked on a treadmill before and after corrective surgery. During each test, conducted at each child's naturally selected speed, two situations were studied: steady state level walking for 9 min, and then walking at an increasing inclination up to 20% for another 10 min. During the test the subjects were allowed to hold on to a handrail to eliminate the risk of falling off the treadmill. The corrective surgery resulted in a 5% reduction in oxygen consumption per kg body mass during level walking. The subjects' levels of physical fitness, as estimated from oxygen pulse, however, were unchanged. These results are indicative of a biomechanical improvement due to the corrective surgery. While walking at a 20% inclination the subjects off loaded themselves to different degrees on the handrail which influenced the results. Their feeling of exhaustion at this load was probably due to local factors, since heart rate was well below maximal values, and blood lactate, respiratory exchange ratio and ventilatory equivalent also indicated that they were below their anaerobic thresholds (50-60% of maximal oxygen uptake).
对6名脑性瘫痪儿童在矫正手术前后在跑步机上行走时的机械效率、心率、血乳酸及其他一些变量进行了研究。在每次以每个儿童自然选择的速度进行的测试中，研究了两种情况：以稳定状态水平行走9分钟，然后以逐渐增加的坡度行走至20%，再持续10分钟。在测试过程中，允许受试者抓住扶手以消除从跑步机上跌落的风险。矫正手术使水平行走时每千克体重的耗氧量降低了5%。然而，根据氧脉搏估算的受试者体能水平并未改变。这些结果表明矫正手术带来了生物力学方面的改善。在以20%的坡度行走时，受试者在不同程度上依靠扶手减轻自身负担，这影响了测试结果。他们在这种负荷下的疲劳感可能是由于局部因素，因为心率远低于最大值，血乳酸、呼吸交换率和通气当量也表明他们低于无氧阈值（最大摄氧量的50 - 60%）。
