Effects of once weekly NMES training on knee extensors fatigue and body composition in a person with spinal cord injury
Effects of once weekly NMES training on knee extensors fatigue and body composition in a person with spinal cord injury
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DOI：
10.1179/2045772314y.0000000293
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发表时间：
2016-01-01
影响因子：
1.7
通讯作者：
Khalil, Refka E.
中科院分区：
文献类型：
--
作者：
Gorgey, Ashraf S.;Caudill, Caelb;Khalil, Refka E.
研究设计：单一受试者病例（男性，33岁，T6 SCI AIS A）。目的：确定每周进行一次的表面神经肌肉电刺激（NMES）训练对改善脊髓损伤（SCI）个体的抗疲劳性以及局部和全身组成的影响。设置：SCI中心内的实验室设置。方法：采用踝关节负重，对瘫痪的膝伸肌进行表面NMES阻力训练（RT），每周一次，持续12周。膝关节伸肌疲劳指数由30次重复中达到的重复次数确定。在第一次训练前和最后一次训练后一周，使用全身双能X射线吸收测量法进行全身和局部身体成分，包括体脂百分比（%BF），脂肪量（FM），瘦体重（LM）。参与者的依从率为83%，他能够分别在右腿和左腿上举起6磅和2磅。右膝伸肌比左膝伸肌表现出更大的抗疲劳性。腿部LM增加6%，同时手臂、躯干和全身LM分别减少-4.7%、-13%和-5%。结论：每周一次NMES放疗可引起下肢LM局部的积极变化，而不会引起其他区域和全身LM的持续性损失或FM的增加。训练有效地增加了力量，以及抗疲劳的训练膝伸肌。
Study design: Single-subject case (male, 33 years of age, T6 SCI AIS A).Objectives: To determine the effect of surface neuromuscular electrical stimulation (NMES) training conducted once weekly on improving fatigue resistance as well as regional and whole body composition in an individual with spinal cord injury (SCI).Setting: Laboratory setting within a SCI Center.Methods: Surface NMES resistance training (RT) of the paralyzed knee extensors was conducted once weekly for 12 weeks using ankle weights. Knee extensor fatigue index was determined by the number of repetitions (reps) achieved out of 30 reps. Total and regional body composition including percentage body fat (%BF), fat mass (FM), lean mass (LM) were conducted before the first session and one week after the last training session using whole-body dual-energy X-ray absorptiometry.Results: The participant had a compliance rate of 83% and he was able to lift 6 and 2 lbs on the right and left legs, respectively. Right knee extensors showed greater fatigue resistance compared to the left one. Leg LM increased by 6% accompanied with decrease in arm, trunk and total body LM by -4.7%, -13%, -5%, respectively. The % BF increased by 8%, 7.3%, 15.5%, 11.5% for arm, legs, trunk and total body.Conclusion: Once weekly of NMES RT evokes local positive changes in leg LM without reciprocating the continuous loss in LM or gain in FM in other regions and total body. Training was effective in increasing strength as well as fatigue resistance of the trained knee extensors.