Metabolic Demand and Muscle Activation during Different Forms of Bodyweight Supported Locomotion in Men with Incomplete SCI
Metabolic Demand and Muscle Activation during Different Forms of Bodyweight Supported Locomotion in Men with Incomplete SCI
复制标题
DOI：
10.1155/2014/632765
复制
发表时间：
2014-01-01
影响因子：
--
通讯作者：
Hicks, Audrey L.
中科院分区：
文献类型：
--
作者：
Fenuta, Alyssa M.;Hicks, Audrey L.
体重支持的运动训练使用神经可塑性原理来改善脊髓损伤(SCI)后的恢复。使用Lokomat、手动跑步机和ZeroG对7名男性不完全性脊髓损伤患者(42.6±4.29岁)和匹配的(性别、年龄)非损伤对照组(42.7+/-5.4岁)使用相同体重支持(BWS)百分比的稳态运动进行了比较。在2分钟的治疗过程中，佩戴了VO2000、极心率(HR)监测器和下肢肌电(EMG)电极。氧摄取量(VO2)和心率用递增臂测功法获得的峰值的百分比表示；VO2也表示与静息代谢当量(METS)相关。将过滤后的胫前肌(TA)、股直肌(RF)、股二头肌(BF)和腓肠肌内侧(MG)的肌电信号归一化为ZeroG步长。Lokomat需要30%的VO2峰值(2METS)，相比之下，手动跑步机和ZeroG训练需要54%的VO2峰值(3METS)。在Lokomat训练期间，HR为峰值的67%，而手动跑步机和ZeroG训练期间的HR为类似的83%。与ZeroG相比，跑步机条件下的肌肉活性更高，这主要是因为BF活动增加。在同一级别的BWS中，使用手动跑步机或ZeroG的运动对有氧运动的要求比Lokomat更高。与地面运动相比，跑步机模式鼓励更大的髋关节伸肌激活。
Body weight supported locomotor training uses neuroplasticity principles to improve recovery following a spinal cord injury (SCI). Steady state locomotion using the same body weight support (BWS) percent was compared in 7 males (42.6 +/- 4.29 years) with incomplete SCI and matched (gender, age) noninjured controls (42.7 +/- 5.4 years) using the Lokomat, Manual Treadmill, and ZeroG. The VO2000, Polar Heart Rate (HR) Monitor, and lower limb electromyography (EMG) electrodes were worn during the 2-minute sessions. Oxygen uptake (VO2) and HR were expressed as percentage of peak values obtained using progressive arm ergometry; VO2 was also expressed relative to resting metabolic equivalents (METS). Filtered EMG signals from tibialis anterior (TA), rectus femoris (RF), biceps femoris (BF), and medial gastrocnemius (MG) were normalized to ZeroG stepping. The Lokomat required 30% of VO2 peak (2METS) compared to similar to 54%(3METS) for Manual Treadmill and ZeroG sessions. HR was 67% of peak during Lokomat sessions compared to similar to 83% for Manual Treadmill and ZeroG. Muscle activation was higher in treadmill conditions compared to the ZeroG primarily due to increased BF activity. At the same level of BWS, locomotion using the Manual Treadmill or the ZeroG is more aerobically demanding than the Lokomat. Treadmill modalities encourage greater hip extensor activation compared to overground locomotion.