The Validity of the Nordic Hamstring Lower for a Field-Based Assessment of Eccentric Hamstring Strength
The Validity of the Nordic Hamstring Lower for a Field-Based Assessment of Eccentric Hamstring Strength
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DOI：
10.1123/jsr.2013-0097
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发表时间：
2015-02-01
影响因子：
1.7
通讯作者：
Graham-Smith, Philip
中科院分区：
文献类型：
--
作者：
Sconce, Emma;Jones, Paul;Graham-Smith, Philip
背景：腘绳肌损伤风险评估主要是使用等速测力法进行研究。然而，实际问题，如成本和可用性限制了广泛应用的伤害风险评估的isokkiti，因此，基于现场的替代评估偏心腿筋强度是必要的。目的：本研究的目的是调查在北欧绳肌降低（断点角）作为一个基于现场的偏心绳肌力量测试的角度的有效性。设计：探索性研究。设置：实验室。参会人员：16名男性（n = 7）和女性（n = 9）足球运动员（平均值+/- SD，年龄24 ± 6岁，身高1.77 ± 0.12 m，体重68.5 ± 16.5 kg）作为研究受试者。主要结局指标：作者探讨了从视频测量的北欧断点角度（在北欧腿筋下降期间受试者无法再抵抗增加的重力力矩的点）与左右膝屈肌的等速峰值扭矩和峰值扭矩角度之间的关系。结果如下：结果显示，偏心膝屈肌峰值扭矩（左右肢体的平均值）和北欧断点角之间存在有意义的关系（r = -.808，r（2）= 65%，P < .00001）。然而，观察到断点角和峰值扭矩角（左右肢体的平均值）之间存在弱相关性（r = 0.480，r（2）= 23%，P = 0.06）。结论：结果表明，在北欧腿筋降低过程中实现的断点角度可以用作偏心腿筋强度的实地评估。
Context: Hamstring injury-risk assessment has primarily been investigated using isokinetic dynamometry. However, practical issues such as cost and availability limit the widespread application of isokinetics for injury-risk assessment; thus, field-based alternatives for assessing eccentric hamstring strength are needed. Objective: The aim of this study was to investigate the validity of the angle achieved during Nordic hamstring lowers (break-point angle) as a field-based test for eccentric hamstring strength. Design: Exploratory study. Setting: Laboratory. Participants: Sixteen male (n = 7) and female (n = 9) soccer players (mean +/- SD age 24 +/- 6 y, height 1.77 +/- 0.12 m, and body mass 68.5 +/- 16.5 kg) acted as subjects for the study. Main Outcome Measures: The authors explored relationships between the Nordic break-point angle (the point at which the subject can no longer resist the increasing gravitational moment during a Nordic hamstring lower) measured from video and isokinetic peak torque and angle of peak torque of right- and left-knee flexors. Results: The results revealed a meaningful relationship between eccentric knee-flexor peak torque (average of right and left limbs) and the Nordic break-point angle (r = -.808, r(2) = 65%, P < .00001). However, there was a weak relationship observed (r = .480, r(2) = 23%, P = .06) between break-point angle and the angle of peak torque (average of right and left limbs). Conclusions: The results suggest that the break-point angle achieved during Nordic hamstring lowers could be used as a field-based assessment of eccentric hamstring strength.