Fenuta Alyssa M, Hicks Audrey L
Department of Kinesiology, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4L8.
Biomed Res Int. 2014;2014:632765. doi: 10.1155/2014/632765. Epub 2014 May 21.
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 ~54% (3METS) for Manual Treadmill and ZeroG sessions. HR was 67% of peak during Lokomat sessions compared 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.
体重支撑式运动训练运用神经可塑性原理来促进脊髓损伤（SCI）后的恢复。在7名男性（42.6±4.29岁）不完全性脊髓损伤患者及匹配的（性别、年龄）未受伤对照者（42.7±5.4岁）中，使用Lokomat、手动跑步机和ZeroG，比较了采用相同体重支撑（BWS）百分比时的稳态运动情况。在2分钟的训练过程中，受试者佩戴VO2000、极地心率（HR）监测仪和下肢肌电图（EMG）电极。摄氧量（VO2）和心率以递增式手臂测力计测得的峰值百分比表示；VO2也相对于静息代谢当量（METS）来表示。来自胫前肌（TA）、股直肌（RF）、股二头肌（BF）和腓肠肌内侧头（MG）的滤波后的肌电图信号以ZeroG步行为标准进行归一化处理。与手动跑步机和ZeroG训练的约54%（3METS）相比，Lokomat训练时VO2峰值为30%（2METS）。Lokomat训练时心率为峰值的67%，而手动跑步机和ZeroG训练时约为83%。与ZeroG相比，跑步机训练条件下的肌肉激活程度更高，主要是由于BF活动增加。在相同的BWS水平下，使用手动跑步机或ZeroG进行的运动比Lokomat对有氧能力的要求更高。与地面行走相比，跑步机训练方式能促进更大程度的髋伸肌激活。
