Duffell Lynsey D, Donaldson Nick de N, Perkins Tim A, Rushton David N, Hunt Kenneth J, Kakebeeke Tanja H, Newham Di J
Division of Applied Biomedical Research, School of Biomedical and Health Sciences, King's College London, 3.8 Shepherd's House, Guy's Campus, London SE1 1UL, UK.
Muscle Nerve. 2008 Oct;38(4):1304-11. doi: 10.1002/mus.21060.
Inactivity and muscular adaptations following spinal cord injury (SCI) result in secondary complications such as cardiovascular disease, obesity, and pressure sores. Functional electrically stimulated (FES) cycling can potentially reduce these complications, but previous studies have provided inconsistent results. We studied the effect of intensive long-term FES cycle training on muscle properties in 11 SCI subjects (mean +/- SEM: 41.8 +/- 2.3 years) who had trained for up to 1 hour/day, 5 days/week, for 1 year. Comparative measurements were made in 10 able-bodied (AB) subjects. Quadriceps maximal electrically stimulated torque increased fivefold (n = 5), but remained lower than in AB individuals. Relative force response at 1 HZ decreased, relaxation rate remained unchanged, and fatigue resistance improved significantly. Power output (PO) improved to a lesser extent than quadriceps torque and not to a greater extent than has been reported previously. We need to understand the factors that limit PO in order to maximize the benefits of FES cycling.
脊髓损伤（SCI）后的活动减少和肌肉适应性变化会导致诸如心血管疾病、肥胖和压疮等继发性并发症。功能性电刺激（FES）骑行有可能减少这些并发症，但先前的研究结果并不一致。我们研究了长期强化FES骑行训练对11名SCI受试者（平均±标准误：41.8±2.3岁）肌肉特性的影响，这些受试者每天训练长达1小时，每周训练5天，共训练1年。对10名健全（AB）受试者进行了对比测量。股四头肌最大电刺激扭矩增加了五倍（n = 5），但仍低于AB个体。1赫兹时的相对力反应降低，松弛率保持不变，抗疲劳能力显著提高。功率输出（PO）的改善程度小于股四头肌扭矩，且改善程度不大于先前报道。我们需要了解限制PO的因素，以便最大限度地发挥FES骑行的益处。
