Division of Surgery, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Charing Cross Hospital, London, UK.
J Electromyogr Kinesiol. 2012 Jun;22(3):383-90. doi: 10.1016/j.jelekin.2012.02.006. Epub 2012 Mar 3.
There is some evidence that the Biering-Sorensen endurance test can discriminate low back pain sufferers from healthy individuals and can predict future back pain. This test relies on the subject's ability to voluntarily drive the back muscles. This neural drive, termed voluntary activation (VA) can be measured using the twitch interpolation technique. The aim of the current study was to investigate the relationship between back muscle endurance and VA. Twenty-one healthy volunteers (10 males) participated. Bilateral electromyographic recordings were obtained from erector spinae and rectus abdominis. Back extensor torque was recorded using a dynamometer. The protocol consisted of measurement of VA (using magnetic stimulation of the brain and assessment of the sizes of the evoked twitches) and measurement of endurance. There was a linear correlation (r(2)=1, P<0.01) between voluntary torque and VA. The mean (SEM) endurance time was 174.9 (12.8)s. There was no correlation between endurance and VA at either 100% MVC (r(2)=0.01, P=0.72) or at 50% MVC (r(2)=0.11, P=0.16). These findings indicate that the endurance of the back muscles, as assessed using this widely utilised test does not appear to be related to a subject's ability to drive their back muscles voluntarily either maximally or submaximally.
有一些证据表明，比耶林-索伦森耐力测试可以区分腰痛患者和健康个体，并可以预测未来的背痛。该测试依赖于受试者主动驱动背部肌肉的能力。这种神经驱动，称为自愿激活（VA），可以使用抽搐插值技术进行测量。本研究的目的是调查背肌耐力和 VA 之间的关系。21 名健康志愿者（10 名男性）参加了研究。从竖脊肌和腹直肌获得双侧肌电图记录。使用测力计记录背部伸肌扭矩。该方案包括测量 VA（使用大脑磁刺激和评估诱发抽搐的大小）和耐力测量。在自愿扭矩和 VA 之间存在线性相关性（r²=1，P<0.01）。耐力时间的平均值（SEM）为 174.9（12.8）s。在 100% MVC（r²=0.01，P=0.72）或 50% MVC（r²=0.11，P=0.16）时，耐力与 VA 之间均无相关性。这些发现表明，使用这种广泛使用的测试评估的背部肌肉耐力似乎与受试者最大限度或次最大限度地主动驱动背部肌肉的能力无关。
