Department of Kinesiology, University of Toledo, Toledo, OH.
J Orthop Sports Phys Ther. 2015 Mar;45(3):220-32. doi: 10.2519/jospt.2015.5222. Epub 2015 Jan 27.
Randomized crossover laboratory study.
To determine the effects of ankle destabilization devices on surface electromyography (sEMG) measures of selected lower extremity muscles during functional exercises in participants with chronic ankle instability.
Ankle destabilization devices are rehabilitation tools that can be worn as a boot or sandal to increase lower extremity muscle activation during walking in healthy individuals. However, they have not been tested in a population with pathology.
Fifteen adults with chronic ankle instability participated. Surface electromyography electrodes were located over the anterior tibialis, fibularis longus, lateral gastrocnemius, rectus femoris, biceps femoris, and gluteus medius. The activity level of these muscles was recorded in a single testing session during unipedal stance with eyes closed, the Star Excursion Balance Test, lateral hops, and treadmill walking. Each task was performed under 3 conditions: shod, ankle destabilization boot, and ankle destabilization sandal. Surface electromyography signal amplitudes were measured for each muscle during each exercise for all 3 conditions.
Participants demonstrated a significant increase, with moderate to large effect sizes, in sEMG signal amplitude of the fibularis longus in the ankle destabilization boot and ankle destabilization sandal conditions during the unipedal eyes-closed balance test, the Star Excursion Balance Test in the anterior and posteromedial directions, lateral hops, and walking, when compared to the shod condition. Both devices also resulted in an increase in sEMG signal amplitudes, with large effect sizes of the lateral gastrocnemius, rectus femoris, biceps femoris, and gluteus medius during the unipedal-stance-with-eyes-closed test, compared to the shod condition.
Wearing ankle destabilization devices caused greater muscle activation during functional exercises in individuals with chronic ankle instability. Based on the magnitude of the effect, there were consistent increases in fibularis longus sEMG amplitudes during the unipedal eyes-closed balance test, the Star Excursion Balance Test in the anterior and posteromedial directions, and pre-initial contact and post-initial contact during lateral hops and walking.
随机交叉实验室研究。
确定踝关节不稳定装置对慢性踝关节不稳定患者进行功能性运动时下肢特定肌肉表面肌电图（sEMG）测量值的影响。
踝关节不稳定装置是一种康复工具，可作为靴子或凉鞋佩戴，以增加健康个体行走时下肢肌肉的激活。但是，它们尚未在患有病理的人群中进行测试。
15 名慢性踝关节不稳定的成年人参加了研究。将表面肌电图电极放置在前胫骨、腓骨长肌、外侧腓肠肌、股直肌、股二头肌和臀中肌上。在闭眼单足站立、星形伸展平衡测试、侧向跳跃和跑步机行走的单次测试中记录这些肌肉的活动水平。每个任务在 3 种情况下进行：穿鞋、踝关节不稳定靴和踝关节不稳定凉鞋。在所有 3 种情况下，测量每个运动时每个肌肉的表面肌电图信号幅度。
与穿鞋条件相比，参与者在闭眼单足平衡测试、星形伸展平衡测试前内侧和后内侧方向、侧向跳跃和行走时，踝关节不稳定靴和踝关节不稳定凉鞋条件下腓骨长肌的 sEMG 信号幅度显著增加，具有中等至较大的效应量。两种装置还导致外侧腓肠肌、股直肌、股二头肌和臀中肌的 sEMG 信号幅度增加，与穿鞋条件相比，具有较大的效应量。
在慢性踝关节不稳定患者进行功能性运动时，佩戴踝关节不稳定装置会导致更大的肌肉激活。基于效应的大小，在闭眼单足平衡测试、星形伸展平衡测试前内侧和后内侧方向以及侧向跳跃和行走中的初始接触前和初始接触后，腓骨长肌的 sEMG 振幅持续增加。
