The Relationship between Nordic Hamstring Test and Isokinetic Dynamometry in Football and Track and Field Student Athletes: a Cross-Sectional Study

Sadri-Aghdam, Nader; rezaei, mandana; Azghani, Mahmood Reza; Ghaderi, Fereshteh; Adigozali, Hakimeh

doi:10.32098/mltj.04.2020.24

Cited by 4 publications

(6 citation statements)

References 27 publications

(70 reference statements)

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“…The ICC for BPA was moderate (0.65) during the NHT. Sadri-Aghdam et al recently assessed the reliability of BPA among recreational football players and track and field student-athletes during the NHT (24), showing high reliability (ICC = 0.93 -0.98) for BPA in both groups.…”

Section: Discussionmentioning

confidence: 99%

“…All participants scored 9 or higher on the Tegner activity scale and played in the second division of the Iranian football league (21). Players with a history of HM injury or other lower limb injuries, such as soft tissue damage and fractures in the past six months, hyperlordosis in the lumbar spine, or any neurological disorders, were excluded from the study (24). This research received approval from the Tabriz University of Medical Sciences Ethical Committee (IR.TBZMED.REC.1400.1089).…”

Section: Study Participantsmentioning

confidence: 99%

“…The reliability of MAG and SI was explored in individuals with incomplete spinal cord injuries (23), showing good to excellent reliability [MAG (ICC = 0.71 -0.99), SI (ICC = 0.65 -0.96)] in repeated tests. The reliability of BPA was also examined in football and track and field student-athletes (24), revealing perfect reliability (ICC = 0.93 -0.98). However, the reliability of VRI in healthy professional athletic populations remains a subject of ongoing research.…”

Section: Introductionmentioning

confidence: 99%

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Reliability of Voluntary Response Index Analysis Using Surface Electromyography in Professional Football Players

Firouzi,

Azghani,

Rezaei

et al. 2024

Middle East J Rehabil Health Stud

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Background: Surface electromyography (sEMG) represents a widely utilized technique in medical research. The voluntary response index (VRI) introduces a novel method for analyzing the motor control of voluntary movements via sEMG. This study aimed to assess the reliability of VRI and breakpoint angles (BPA) among professional football players during the Nordic Hamstring test (NHT). Methods: This study included 24 healthy professional football players. Through the use of sEMG, two aspects of VRI [magnitude (MAG) and similarity index (SI)] were evaluated during the NHT. Additionally, BPAs were determined by capturing slow-motion videos of functional tasks. The test-retest reliability across three trials was determined using the intra-class correlation coefficient (ICC). Results: The reliability of the VRI components during the NHT was found to be excellent. The ICC for MAG was 0.9 and 0.81 for the SI. Breakpoint angles exhibited moderate reliability (ICC = 0.65) during a functional task. The SI displayed a lower standard error of measurement (SEM = 0.07). The MAG’s SEM was 0.25, while BPA’s SEM was 17.8. Conclusions: The analysis of the VRI via sEMG showed nearly perfect reliability in professional football players during the NHT, a functional task. Breakpoint angles demonstrated significant reliability. The findings of this study indicate that both VRI and BPA are reliable methods for estimating motor control during dynamic movement tasks in professional athletes.

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Section: Discussionmentioning

confidence: 99%

Section: Study Participantsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reliability of Voluntary Response Index Analysis Using Surface Electromyography in Professional Football Players

Firouzi,

Azghani,

Rezaei

et al. 2024

Middle East J Rehabil Health Stud

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“…This deficiency might mask high inter-individual variability of exercise stimuli leading to divergent adaptations [ 94 , 95 , 96 ]. Only three studies reported data of NHE performances with high eccentric control beyond knee flexion angles of <45° [ 6 , 40 , 84 ]. Two recent studies which investigated NHE with 90° hip flexion only included participants who were able to perform more than 50% of the NHE knee ROM in a controlled manner [ 18 , 77 ].…”

Section: Discussionmentioning

confidence: 99%

“…However, withstanding high eccentric loads in extended knee angles is crucial to prevent muscle and knee injuries [ 2 , 3 , 4 , 35 , 48 , 49 , 50 ]. Therefore, not only the amount of strength is of particular interest, but the controlled ROM during NHE execution (‘angle at downward acceleration’, φ DWA ) and the maintenance of a high muscle activation [ 40 , 41 , 43 , 71 , 81 , 82 , 83 , 84 ] as well. The combination of both parameters provides a comprehensive evaluation of NHE performance.…”

Section: Introductionmentioning

confidence: 99%

Quo Vadis Nordic Hamstring Exercise-Related Research?—A Scoping Review Revealing the Need for Improved Methodology and Reporting

Alt¹,

Severin

Schmidt

2022

IJERPH

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The objective of this scoping review is to assess Nordic Hamstring Exercise quality (ANHEQ) of assessments and interventions according to the ANHEQ rating scales and to present practical recommendations for the expedient design and reporting of future studies. A total of 71 Nordic Hamstring Exercise (NHE) assessments and 83 NHE interventions were selected from the data sources PubMed, Scopus, and SPORTDiscus. Research studies which were presented in peer-reviewed academic journals and implemented the NHE during laboratory-based assessments or multi-week interventions met the eligibility criteria. NHE assessments analyzed force (51%), muscle activation (41%), knee angle kinematics (38%), and bilateral symmetry (37%). NHE interventions lasted 4–8 weeks (56%) and implied an exercise volume of two sessions per week (66%) with two sets per session (41%) and ≥8 repetitions per set (39%). The total ANHEQ scores of the included NHE assessments and interventions were 5.0 ± 2.0 and 2.0 ± 2.0 (median ± interquartile range), respectively. The largest deficits became apparent for consequences of impaired technique (87% 0-point-scores for assessments) and kneeling height (94% 0-point-scores for interventions). The 0-point-scores were generally higher for interventions compared to assessments for rigid fixation (87% vs. 34%), knee position (83% vs. 48%), kneeling height (94% vs. 63%), and separate familiarization (75% vs. 61%). The single ANHEQ criteria, which received the highest score most frequently, were rigid fixation (66% of assessments) and compliance (33% of interventions). The quality of NHE assessments and interventions was generally ‘below average’ or rather ‘poor’. Both NHE assessments and interventions suffered from imprecise reporting or lacking information regarding NHE execution modalities and subsequent analyses. Based on the findings, this scoping review aggregates practical guidelines how to improve the design and reporting of future NHE-related research.

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Relationship between the Nordic hamstring strength test and isokinetic hamstring strength test at different eccentric contraction velocities

Katarina,

Vedran,

Darjan

2023

International Journal of Performance Analysis in Sport

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The Relationship between Nordic Hamstring Test and Isokinetic Dynamometry in Football and Track and Field Student Athletes: a Cross-Sectional Study

Cited by 4 publications

References 27 publications

Reliability of Voluntary Response Index Analysis Using Surface Electromyography in Professional Football Players

Reliability of Voluntary Response Index Analysis Using Surface Electromyography in Professional Football Players

Quo Vadis Nordic Hamstring Exercise-Related Research?—A Scoping Review Revealing the Need for Improved Methodology and Reporting

Relationship between the Nordic hamstring strength test and isokinetic hamstring strength test at different eccentric contraction velocities

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