新型推进式足跟提升矫形器对休闲跑者腓肠肌三头肌肌肉活动的影响
Muscle Activity of the Triceps Surae With Novel Propulsion Heel-Lift Orthotics in Recreational Runners.
作者信息
Sánchez-Gómez Rubén, Becerro-de-Bengoa-Vallejo Ricardo, Romero Morales Carlos, Losa-Iglesias Marta Elena, Castrillo de la Fuente Aitor, López-López Daniel, Díez Vega Ignacio, Calvo-Lobo César
机构信息
Faculty of Nursing, Physiotherapy and Podiatry, Universidad Complutense de Madrid, Madrid, Spain.
Faculty of Sport Sciences, Universidad Europea de Madrid, Villaviciosa de Odón, Madrid, Spain.
出版信息
Orthop J Sports Med. 2020 Oct 16;8(10):2325967120956914. doi: 10.1177/2325967120956914. eCollection 2020 Oct.
BACKGROUND
The triceps surae muscle has been identified with propulsion during running gait, and typical heel-lift orthotics (THOs) have been used to treat some sports injuries of this structural-biomechanical unit. The effects of a novel propulsion heel-lift orthotic (PHO) on surface electromyography (EMG) activity of the gastrocnemius during a full cycle of running have yet to be tested.
PURPOSE/HYPOTHESIS: We aimed to assess EMG changes in gastrocnemius medialis and lateralis muscle activity when wearing THOs, PHOs, or neutral sports shoes only (SO) during running. We hypothesized that EMG activity of the triceps surae muscle would be lower for PHOs than THOs or SO during running.
STUDY DESIGN
Controlled laboratory study.
METHODS
A total of 26 healthy, regular recreational runners of both sexes (mean age, 33.58 ± 6.02 years) with a neutral Foot Posture Index and rearfoot strike pattern were recruited to run on a treadmill at 9 km/h using aleatory THOs of 6 and 9 mm, PHOs, and SO while EMG activity of the gastrocnemius medialis and lateralis muscles was recorded over a 30-second period. Intraclass correlation coefficients were calculated to assess reliability.
RESULTS
The intraclass correlation coefficient values indicated near perfect reliability, ranging from 0.801 for 6-mm THOs to 0.959 for SO in the gastrocnemius lateralis muscle. EMG activity of the gastrocnemius lateralis muscle was greater for PHOs (25.516 ± 4.780 mV) than for SO (23.140 ± 4.150 mV) ( < .05), but EMG activity of the gastrocnemius medialis muscle did not show any statistically significant difference between conditions (23.130 ± 2.980 mV vs 26.315 ± 2.930 mV, respectively) ( .3).
CONCLUSION
A novel PHO may increase muscle activity of the gastrocnemius lateralis during a full cycle of running gait; consequently, its prescription to treat triceps surae muscle injuries is cautioned.
CLINICAL RELEVANCE
The prescription of novel PHOs could increase EMG activity, which has not been previously described.
背景
在跑步步态中，小腿三头肌已被确定与推进力有关，典型的足跟提升矫形器（THO）已被用于治疗该结构生物力学单元的一些运动损伤。一种新型推进式足跟提升矫形器（PHO）对跑步全周期中腓肠肌表面肌电图（EMG）活动的影响尚未得到测试。
目的/假设：我们旨在评估跑步时穿着THO、PHO或仅穿中性运动鞋（SO）时，腓肠肌内侧和外侧肌肉活动的肌电图变化。我们假设，跑步时PHO的小腿三头肌肌电图活动低于THO或SO。
研究设计
对照实验室研究。
方法
招募了26名健康的、有规律的男女休闲跑步者（平均年龄33.58±6.02岁），他们具有中性足姿势指数和后足着地模式，在跑步机上以9公里/小时的速度跑步，分别使用6毫米和9毫米的随机THO、PHO和SO，同时在30秒内记录腓肠肌内侧和外侧肌肉的肌电图活动。计算组内相关系数以评估可靠性。
结果
组内相关系数值表明可靠性接近完美，腓肠肌外侧肌肉中，6毫米THO的为0.801，SO的为0.959。PHO（25.516±4.780毫伏）的腓肠肌外侧肌肉肌电图活动高于SO（23.140±4.150毫伏）（P<0.05），但腓肠肌内侧肌肉的肌电图活动在不同条件下未显示任何统计学显著差异（分别为23.130±2.980毫伏和26.315±2.930毫伏）（P>0.3）。
结论
一种新型PHO可能会在跑步步态的全周期中增加腓肠肌外侧的肌肉活动；因此，在治疗小腿三头肌损伤时，对其处方应谨慎。
临床意义
新型PHO的处方可能会增加肌电图活动，这在以前尚未有过描述。
Zotero 插件