Kinesiology Program, University of Virginia, Charlottesville, VA.
J Sport Rehabil. 2014 May;23(2):134-44. doi: 10.1123/jsr.2013-0021. Epub 2014 Jan 21.
Ankle-destabilization devices are rehabilitation tools that may improve neuromuscular control by increasing lower-extremity muscle activation. Their effects should be tested in healthy individuals before being implemented in rehabilitation programs.
To compare EMG activation of lower-extremity muscles during walking while wearing 2 different ankle-destabilization devices.
Crossover.
Laboratory.
15 healthy young adults (5 men, 10 women).
Surface EMG activity was recorded from the anterior tibialis, peroneus longus, lateral gastrocnemius, rectus femoris, biceps femoris, and gluteus medius as subjects walked on a treadmill shod, with an ankle-destabilization boot (ADB), and an ankle-destabilization sandal (ADS).
Normalized amplitudes 100 ms before and 200 ms after initial heel contact, time of onset activation relative to initial contact, and percent of activation time across the stride cycle were calculated for each muscle in each condition.
The precontact amplitudes of the peroneus longus and lateral gastrocnemius and the postcontact amplitudes of the lateral gastrocnemius were significantly greater in the ADB and ADS conditions. In the ADB condition, the rectus femoris and biceps femoris postcontact amplitudes were significantly greater than shod. The peroneus longus and lateral gastrocnemius were activated significantly earlier, and the anterior tibialis, lateral gastrocnemius, and rectus femoris were activated significantly longer across the stride cycle in the ADB and the ADS conditions. In addition, the peroneus longus was activated significantly longer in the ADB condition when compared with shod.
Both ankle-destabilization devices caused an alteration in muscle activity during walking, which may be favorable to an injured patient. Therefore, implementing these devices in rehabilitation programs may be beneficial to improving neuromuscular control.
踝部不稳定装置是一种康复工具，通过增加下肢肌肉激活来改善神经肌肉控制。在将其纳入康复计划之前，应在健康个体中测试其效果。
比较穿着两种不同踝部不稳定装置行走时下肢肌肉的肌电图激活情况。
交叉设计。
实验室。
15 名健康的年轻成年人（5 名男性，10 名女性）。
当受试者在跑步机上穿着鞋子、踝部不稳定靴（ADB）和踝部不稳定凉鞋（ADS）行走时，记录前胫骨肌、腓骨长肌、外侧比目鱼肌、股直肌、股二头肌和臀中肌的表面肌电图活动。
在初始足跟接触前 100ms 和接触后 200ms 计算每个肌肉在每个条件下的归一化振幅，相对初始接触的激活时间以及在步幅周期内的激活时间百分比。
ADB 和 ADS 条件下腓骨长肌和外侧比目鱼肌的预接触振幅以及外侧比目鱼肌的后接触振幅显著增大。在 ADB 条件下，股直肌和股二头肌的后接触振幅明显大于穿鞋。在 ADB 和 ADS 条件下，腓骨长肌和外侧比目鱼肌更早激活，前胫骨肌、外侧比目鱼肌和股直肌在步幅周期内激活时间更长。此外，与穿鞋相比，ADB 条件下腓骨长肌的激活时间更长。
两种踝部不稳定装置都导致行走时肌肉活动发生改变，这可能对受伤患者有益。因此，在康复计划中实施这些装置可能有助于改善神经肌肉控制。
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