Sconce, E, Jones, PA, Turner, EL, Comfort, P and Graham-Smith, P 2015, 'The validity of the Nordic hamstring lower as a field-based assessment of eccentric hamstring strength' , Journal of Sport Rehabilitation, 24 (1) , pp. 13-20.
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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, r2 = 65%, P < .00001). However, there was a weak relationship observed (r = .480, r2 = 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.
|Uncontrolled Keywords:||break-point angle, peak torque, angle of peak torque, angle of crossover, hamstring injury risk|
|Themes:||Health and Wellbeing|
|Schools:||Schools > School of Health Sciences > Centre for Health Sciences Research|
|Journal or Publication Title:||Journal of Sport Rehabilitation|
|Funders:||Non funded research|
|Depositing User:||Dr Paul Anthony Jones|
|Date Deposited:||20 Feb 2015 15:33|
|Last Modified:||05 Jun 2015 08:57|
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