Environmental temperature and exercise modality independently impact central and muscle fatigue among people with multiple sclerosis.
Environmental temperature and exercise modality independently impact central and muscle fatigue among people with multiple sclerosis.
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DOI：
10.1177/2055217317747625
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发表时间：
2017-10-01
影响因子：
--
通讯作者：
Button, Duane C
中科院分区：
文献类型：
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作者：
Grover, Geetika;Ploughman, Michelle;Button, Duane C
背景技术背景：热敏感和疲劳限制了多发性硬化症患者参与运动的能力。目的：本研究的目的是确定最佳有氧运动参数（环境温度和运动方式）来限制多发性硬化症患者运动引起的中枢和肌肉疲劳。14名患有不同程度残疾的多发性硬化症患者在65%的最大氧气量下完成了四次随机运动：体重支撑跑步机冷却（16°C）、体重支撑跑步机室（21°C）、全身横卧踏步机冷却和全身横卧踏步机室。最大的自愿收缩，肌电图，诱发收缩特性收集更多的受影响的足底屈肌沿着与主观水平的疲劳，体温和感知水平explosion.RESULTS：运动在较冷的室温增加最大自愿收缩力（p=0.010）和稳定的体温（p=0.011）相比，标准室温。多发性硬化症患者的峰值抽搐扭矩（p=0.047），达到抽搐峰值的时间更短（p=0.035）和较长的半弛豫时间（p=0.046）后全身横卧步进提示较少的肌肉疲劳。冷却运动环境限制了有氧运动和使用全身横卧踏步机时中枢疲劳的负面影响（工作分配在四肢），而不是体重支持跑步机减轻肌肉疲劳。治疗师可以滴定这两个变量，以帮助多发性硬化症患者实现足够的运动负荷。
BACKGROUND: Heat sensitivity and fatigue limit the ability of multiple sclerosis patients to participate in exercise.OBJECTIVE: The purpose of this study was to determine the optimal aerobic exercise parameters (environmental temperature and exercise modality) to limit exercise-induced central and muscle fatigue among people with multiple sclerosis.METHODS: Fourteen people with multiple sclerosis with varying levels of disability completed four randomized exercise sessions at 65% of the maximal volume of oxygen: body-weight supported treadmill cool (16°C), body-weight supported treadmill room (21°C), total-body recumbent stepper cool and total-body recumbent stepper room. Maximum voluntary contraction, electromyography, and evoked contractile properties were collected from the more affected plantar flexors along with subjective levels of fatigue, body temperature and perceived level of exertion.RESULTS: Exercise in cooler room temperature increased maximum voluntary contraction force (p=0.010) and stabilized body temperature (p=0.011) compared to standard room temperature. People with multiple sclerosis experienced greater peak twitch torque (p=0.047), shorter time to peak twitch (p=0.035) and a longer half relaxation time (p=0.046) after total-body recumbent stepper suggestive of less muscle fatigue.CONCLUSION: Cooling the exercise environment limits the negative effects of central fatigue during aerobic exercise and using total-body recumbent stepper (work distributed among four limbs) rather than body-weight supported treadmill lessens muscular fatigue. Therapists can titrate these two variables to help people with multiple sclerosis achieve sufficient exercise workloads.