Department of Exercise Sciences, Brigham Young University, Provo, UT, USA.
Department of Exercise Sciences, Brigham Young University, Provo, UT, USA.
J Electromyogr Kinesiol. 2014 Jun;24(3):348-52. doi: 10.1016/j.jelekin.2014.01.009. Epub 2014 Feb 17.
Success has been demonstrated in rehabilitation from certain injuries while using positive-pressure treadmills. However, certain injuries progress even with the lighter vertical loads. Our purpose was to investigate changes in muscle activation for various lower limb muscles while running on a positive-pressure treadmill at different amounts of body weight support. We hypothesized that some muscles would show decreases in activation with greater body weight support while others would not. Eleven collegiate distance runners were recruited. EMG amplitude was measured over 12 lower limb muscles. After a short warm-up, subjects ran at 100%, 80%, 60%, and 40% of their body weight for two minutes each. EMG amplitudes were recorded during the final 30s of each stage. Most muscles demonstrated lower amplitudes as body weight was supported. For the hip adductors during the swing phase and the hamstrings during stance, no significant trend appeared. Positive-pressure treadmills may be useful interventions for certain injuries. However, some injuries, such as hip adductor and hamstring tendonitis or strains may require alternative cross-training to relieve stress on those areas. Runners should be careful in determining how much body weight should be supported for various injuries to return to normal activity in the shortest possible time.
在使用正压跑步机进行康复治疗时，某些损伤已经被证明是有效的。然而，某些损伤即使在较轻的垂直负荷下也会进展。我们的目的是研究在不同的体重支持下，在正压跑步机上跑步时，各种下肢肌肉的肌肉激活变化。我们假设，随着体重支持的增加，一些肌肉的激活会减少，而另一些肌肉则不会。我们招募了 11 名大学生长跑运动员。肌电图幅度在 12 个下肢肌肉上进行了测量。在短暂的热身运动后，受试者以 100%、80%、60%和 40%的体重各跑两分钟。在每个阶段的最后 30 秒记录肌电图幅度。随着体重的支撑，大多数肌肉的振幅都降低了。在摆动阶段的髋关节内收肌和站立阶段的腿筋，没有出现明显的趋势。正压跑步机可能是治疗某些损伤的有效方法。然而，对于髋内收肌和腿筋肌腱炎或拉伤等一些损伤，可能需要替代交叉训练来减轻这些区域的压力。跑步者应该小心确定应该支撑多少体重，以在最短的时间内恢复正常活动。
