Effects of Horizontal Impeding Force Gait Training on Older Adult Push-Off Intensity.
Effects of Horizontal Impeding Force Gait Training on Older Adult Push-Off Intensity.
复制标题
水平阻力步态训练对老年人蹬地强度的影响。
DOI：
10.1249/mss.0000000000002500
复制
发表时间：
2021-03-01
影响因子：
4.1
通讯作者：
Franz, Jason R.
中科院分区：
文献类型：
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作者：
Conway, Katie A.;Crudup, Keyaira L.;Lewek, Michael D.;Franz, Jason R.
衰老和许多步态病理通常以蹬离强度的缺陷为特征（即，推进地面反作用力和峰值踝关节力矩和功率输出）。不幸的是，传统的干预措施，如渐进式阻力训练，旨在提高小腿肌肉的机械输出，通常不能转化为习惯性蹬离强度的功能改善力量增益。施加到身体质心的水平阻碍力系统地增加了在行走的蹬离阶段期间跨越踝关节的肌肉肌腱单元所需的机械输出，这可以通过训练传达长期益处。因此，本研究的目的是调查6周的水平阻碍力量训练范式对改善11名健康但不从事体力活动的老年人（年龄：76±4岁，6 F/5 M）的习惯性蹬离强度的初步疗效。我们发现，老年人显著（p<0.05）增加了18%的等长力量，最大步行速度10%，6分钟步行测试距离9%，作为水平阻碍力量训练的结果。作为这项工作的一个更具临床意义的贡献，我们发现这些受试者在训练后蹬地期间的习惯性踝关节峰值力矩和踝关节峰值功率也分别显著增加了10%和15%（p≤0.036）。我们的结论是，在老年人中使用水平阻碍力可以提高他们的最大肌肉和步行能力，同时鼓励获得新发现的力量增益，从而提高步行过程中的习惯性推离强度。
Aging and many gait pathologies are often characterized by deficits in push-off intensity (i.e., propulsive ground reaction forces and peak ankle moment and power output) during walking. Unfortunately, conventional interventions such as progressive resistance training, designed to enhance calf muscle mechanical output, generally fail to translate strength gains to functional improvements in habitual push-off intensity. Horizontal impeding forces applied to the body’s center of mass systematically augment the mechanical output required from muscle-tendon units spanning the ankle during the push-off phase of walking, which could convey long-term benefits via training. Therefore, the purpose of this study was to investigate the preliminary efficacy of a 6-week horizontal impeding force training paradigm on improving habitual push-off intensity in 11 healthy but not physically active older adults (age: 76±4 years, 6F/5M). We found that older adults significantly (p<0.05) increased measures of isometric strength by 18%, maximum walking speed by 10%, and 6-minute walk test distance by 9% as a result of horizontal impeding force training. As a more clinically significant contribution of this work, we found that those subjects also increased habitual peak ankle moment and peak ankle power during push-off following training by a significant 10% and 15%, respectively (p≤0.036). We conclude that the use of horizontal impeding forces in older adults improves their maximum muscular and walking capacities while encouraging access to newfound strength gains, thereby improving habitual push-off intensity during walking.