The effects of eccentric hamstring training on lower extremity strength and landing kinetics in recreational female athletes

Salci, Yasar; Yıldırım, Ahmet; Çelik, Özgür; Ak, Emre; Koçak, Settar; Korkusuz, Feza

doi:10.3233/ies-2012-0466

Cited by 8 publications

(12 citation statements)

References 20 publications

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“…We were also unable to identify changes in GRF patterns preintervention and postintervention—this is in agreement with results of other studies that studied limb strengthening interventions, 20 21 although contrary to a study that also focused on posterior thigh musculature. 56 Our findings suggest that either the change in force distribution between the joints altered due to internal modifications as GRF patterns stayed relatively constant or that the internal forces are particularly sensitive to small changes in GRF. Studies that found changes in GRF mostly included feedback or plyometric training, which probably included landing feedback training.…”

Section: Discussionmentioning

confidence: 71%

Effects of an 8-week strength training intervention on tibiofemoral joint loading during landing: a cohort study

Czasche

Goodwin

Bull

et al. 2018

BMJ Open Sport Exerc Med

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ObjectivesTo use a musculoskeletal model of the lower limb to evaluate the effect of a strength training intervention on the muscle and joint contact forces experienced by untrained women during landing.MethodsSixteen untrained women between 18 and 28 years participated in this cohort study, split equally between intervention and control groups. The intervention group trained for 8 weeks targeting improvements in posterior leg strength. The mechanics of bilateral and unilateral drop landings from a 30 cm platform were recorded preintervention and postintervention, as was the isometric strength of the lower limb during a hip extension test. The internal muscle and joint contact forces were calculated using FreeBody, a musculoskeletal model.ResultsThe strength of the intervention group increased by an average of 35% (P<0.05; pre: 133±36 n, post: 180±39 n), whereas the control group showed no change (pre: 152±36 n, post: 157±46 n). There were only small changes from pre-test to post-test in the kinematics and ground reaction forces during landing that were not statistically significant. Both groups exhibited a post-test increase in gluteal muscle force during landing and a lateral to medial shift in tibiofemoral joint loading in both landings. However, the magnitude of the increase in gluteal force and lateral to medial shift was significantly greater in the intervention group.ConclusionStrength training can promote a lateral to medial shift in tibiofemoral force (mediated by an increase in gluteal force) that is consistent with a reduction in valgus loading. This in turn could help prevent injuries that are due to abnormal knee loading such as anterior cruciate ligament ruptures, patellar dislocation and patellofemoral pain.

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Section: Discussionmentioning

confidence: 71%

Effects of an 8-week strength training intervention on tibiofemoral joint loading during landing: a cohort study

Czasche

Goodwin

Bull

et al. 2018

BMJ Open Sport Exerc Med

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“…For the studies that reported only standard error, we estimated the SD by multiplying the standard error by the square root of the sample size (n). For the studies that presented the values of torque in Newton meter per kilogram, 55,56 we multiplied the values by the mean weight of the subjects in order to normalize the results and perform a more complete analysis. Furthermore, it is important to point out that for the study that presented its data only through graphs, 57 the values were extracted using the Plot Digitizer.…”

Section: Data Synthesis and Analysismentioning

confidence: 99%

“…56,57,[59][60][61][62][63][65][66][67][68] Eight studies presented suitable data for meta-analysis. Analysis of studies that evaluated eccentric peak torque 55,56,59,61,66 showed a significant difference between NHE and CG (0.68; 95% CI, 0.29 to 1.06; I 2 : 0%; Figure 2). Analysis of studies that assessed eccentric peak force 57,62,67 also showed a significant difference between NHE and CG (01.11; 95% CI, 0.62 to 1.61: I 2 : 55%; Figure 3).…”

Section: Effects Of Nhe On Eccentric Strengthmentioning

confidence: 99%

Effect of Nordic Hamstring Exercise Training on Knee Flexors Eccentric Strength and Fascicle Length: A Systematic Review and Meta-Analysis

Medeiros¹,

Marchiori²,

Baroni³

2021

Journal of Sport Rehabilitation

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Context: Nordic hamstring exercise (NHE) has been widely employed to prevent hamstring strain injuries. However, it is still not clear which adaptations are responsible for the NHE preventive effects. Objectives: The aim of this study was to investigate the effects of NHE on knee flexors eccentric strength and fascicle length. Evidence Acquisition: The search strategy included MEDLINE, PEDro, and Cochrane CENTRAL from inception to April 2020. Randomized clinical trials that have analyzed the effects of NHE training on hamstring eccentric strength and/or fascicle length were included. Evidence Synthesis: From the 1932 studies identified, 12 were included in the systematic review, and 9 studies presented suitable data for the meta-analysis. All studies demonstrated strength increments in response to NHE training (10%–15% and 16%–26% in tests performed on the isokinetic dynamometer and on the NHE device, respectively), as well as significant enhancement of biceps femoris long head fascicle length (12%–22%). Meta-analysis showed NHE training was effective to increase knee flexors eccentric strength assessed with both isokinetic tests (0.68; 95% confidence interval, 0.29 to 1.06) and NHE tests (1.11; 95% confidence interval, 0.62 to 1.61). NHE training was also effective to increase fascicle length (0.97; 95% confidence interval, 0.46 to 1.48). Conclusions: NHE training has the potential of increasing both knee flexors eccentric strength and biceps femoris long head fascicle length.

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“…NHE assessments should present meaningful and comprehensive kinematic and kinetic data of supramaximal NHE performance [ 61 ]. It does not suffice to state that participants were instructed to oppose the increasing gravity-induced acceleration of their trunk for as long as possible by using their posterior thigh muscles as it is previously reported [ 12 , 13 , 24 , 32 , 37 , 39 , 41 , 90 , 114 ]. Instead, a quantification of how well participants fulfilled this task should be realized [ 40 , 41 , 43 , 71 , 82 ].…”

Section: Discussionmentioning

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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The effects of eccentric hamstring training on lower extremity strength and landing kinetics in recreational female athletes

Cited by 8 publications

References 20 publications

Effects of an 8-week strength training intervention on tibiofemoral joint loading during landing: a cohort study

Effects of an 8-week strength training intervention on tibiofemoral joint loading during landing: a cohort study

Effect of Nordic Hamstring Exercise Training on Knee Flexors Eccentric Strength and Fascicle Length: A Systematic Review and Meta-Analysis

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

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