Department of Sports Injury and Corrective Exercises, Payame Noor University, Tehran P.O. Box 19395-4697, Iran.
Department of Sports Injury and Corrective Exercises, Faculty of Sports Sciences, University of Isfahan, Isfahan, Iran.
Mult Scler Relat Disord. 2024 Nov;91:105885. doi: 10.1016/j.msard.2024.105885. Epub 2024 Sep 10.
Most people with multiple sclerosis are diagnosed with bilateral strength asymmetry in the lower limbs. Strength asymmetry increases muscle metabolic cost, muscle fatigability, postural instability, gait disturbance, imbalance, and risk of falling, and negatively affects the quality of life in PwMS. So far, the effects of rehabilitation exercises on reducing the asymmetric index in this population has not been studied convincingly. The purpose of this study was to investigate the effect of suspension exercise on bilateral isometric strength asymmetry of knee muscles in patients with multiple sclerosis.
MATERIALS & METHODS: In this randomized controlled trial, twenty-seven female patients were purposively selected as the statistical sample and randomly divided into the control (n = 13, age: 34.72 ± 5.01 years) and exercise (n = 14, age: 37.62 ± 4.58 years) groups. The control group received routine care while the exercise group received the suspension exercise protocol. Isometric muscle strength and bilateral asymmetry were measured at baseline and after 8 weeks. The Biodex isokinetic dynamometer was used to measure the maximal voluntary isometric contraction of the flexor and extensor muscles of the knee. The analysis of covariance was used to analyze the data.
The isometric strength of the knee extensor muscles in the weak leg at the angle of 20° and in both legs at the angle of 70° in the exercise group improved significantly. Furthermore, the strength of the knee flexor muscles in the exercise group was increased. The amount of bilateral strength asymmetry in the knee flexor and extensor muscles at the angle of 70° significantly decreased in the exercise group.
DISCUSSIONS & CONCLUSIONS: These data suggest that suspension training is a practical approach to manage bilateral asymmetry in knee flexor and extensor muscle strength in patients with an EDSS of less than four.
大多数多发性硬化症患者被诊断为下肢双侧力量不对称。力量不对称会增加肌肉代谢成本、肌肉疲劳性、姿势不稳定性、步态障碍、失衡和跌倒风险，并对多发性硬化症患者的生活质量产生负面影响。到目前为止，康复运动对降低该人群的不对称指数的影响尚未得到令人信服的研究。本研究旨在探讨悬吊运动对多发性硬化症患者膝关节肌肉等长力量双侧不对称的影响。
在这项随机对照试验中，二十七个女性患者被有目的地选为统计样本，并随机分为对照组（n = 13，年龄：34.72 ± 5.01 岁）和运动组（n = 14，年龄：37.62 ± 4.58 岁）。对照组接受常规护理，而运动组则接受悬吊运动方案。在基线和 8 周后测量等速肌肉力量和双侧不对称。使用 Biodex 等速测力计测量膝关节屈肌和伸肌的最大自主等长收缩。采用协方差分析进行数据分析。
运动组在 20°时弱腿的膝关节伸肌等长力量和 70°时双腿的等长力量显著提高。此外，运动组的膝关节屈肌力量也有所增强。运动组膝关节屈肌和伸肌在 70°时的双侧力量不对称程度显著降低。
这些数据表明，悬吊训练是一种实用的方法，可以改善 EDSS 小于 4 的患者膝关节屈肌和伸肌力量的双侧不对称。
