Lack of Effect of Ankle Position During the Nordic Curl on Muscle Activity of the Biceps Femoris and Medial Gastrocnemius

Comfort, Paul; Regan, A; Herrington, Lee; Thomas, Chris; McMahon, John J.; Jones, Paul A.

doi:10.1123/jsr.2015-0130

Cited by 13 publications

(23 citation statements)

References 19 publications

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“…Our data may partially support this assertion, as the range and degree of correlations were slightly higher in the supine, hip neutral position as compared to the seated position. Inter-rater reliability of the NordBord exceeded the previously published values and is comparable to those observed by Lodge et al 56 for the Hamstring Solo dynamometer. Consequently, the NordBord shows high test-retest reliability and a moderate correlation with isometric knee flexion assessed with the BD.…”

Section: Effect Of Hip and Ankle Position On Knee Flexor Isometric Strengthsupporting

confidence: 88%

“…The authors attributed this to the characteristics of the tasks, whereby the hip is in a relatively neutral position during the Nordic hamstring curl opposed to seated knee flexion, and the bilateral nature of the Nordic hamstring curl as compared to unilateral isokinetic measures. Conversely, Lodge et al 56 assessed a comparable Nordic dynamometer (Hamstring Solo Elite) and found an inter-device correlation of 0.823 and 0.840 between the left and right limbs with isokinetic eccentric knee flexion torque at 30 o /s. Our data may partially support this assertion, as the range and degree of correlations were slightly higher in the supine, hip neutral position as compared to the seated position.…”

Section: Effect Of Hip and Ankle Position On Knee Flexor Isometric Strengthmentioning

confidence: 99%

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Comparison of Common Methodologies for the Determination of Knee Flexor Muscle Strength

Ogborn

Bellemare

Bruinooge

et al. 2021

International Journal of Sports Physical Therapy

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Background Knee flexion strength may hold important clinical implications for the determination of injury risk and readiness to return to sport following injury and orthopedic surgery. A wide array of testing methodologies and positioning options are available that require validation prior to clinical integration. The purpose of this study was to 1) investigate the validity and test-retest reliability of isometric knee flexion strength measured by a fixed handheld dynamometer (HHD) apparatus compared to a Biodex Dynamometer (BD), 2) determine the impact of body position (seated versus supine) and foot position (plantar- vs dorsiflexed) on knee flexion peak torque and 3) establish the validity and test-retest reliability of the NordBord Hamstring Dynamometer. Study Design Validity and reliability study, test-retest design. Methods Forty-four healthy participants (aged 27 ± 4.8 years) were assessed by two raters over two testing sessions separated by three to seven days. Maximal isometric knee flexion in the seated and supine position at 90 o knee flexion was measured with both a BD and an externally fixed HHD with the foot held in maximal dorsiflexion or in plantar flexion. The validity and test-retest reliability of eccentric knee flexor strength on the NordBord hamstring dynamometer was assessed and compared with isometric strength on the BD. Results Level of agreement between HHD and BD torque demonstrated low bias (bias -0.33 Nm, SD of bias 13.5 Nm; 95% LOA 26.13 Nm, -26.79 Nm). Interrater reliability of the HHD was high, varying slightly with body position (ICC range 0.9-0.97, n=44). Isometric knee flexion torque was higher in the seated versus supine position and with the foot dorsiflexed versus plantarflexed. Eccentric knee flexion torque had a high degree of correlation with isometric knee flexion torque as measured via the BD (r=0.61-0.86). The NordBord had high test-retest reliability (0.993 (95%CI 0.983-0.997, n=19) for eccentric knee flexor strength, with an MDC 95 of 26.88 N and 28.76 N for the left and right limbs respectively. Conclusion Common measures of maximal isometric knee flexion display high levels of correlation and test-retest reliability. However, values obtained by an externally fixed HHD are not interchangeable with values obtained via the BD. Foot and body position should be considered and controlled during testing. Level of Evidence 2b

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Section: Effect Of Hip and Ankle Position On Knee Flexor Isometric Strengthsupporting

confidence: 88%

Section: Effect Of Hip and Ankle Position On Knee Flexor Isometric Strengthmentioning

confidence: 99%

Comparison of Common Methodologies for the Determination of Knee Flexor Muscle Strength

Ogborn

Bellemare

Bruinooge

et al. 2021

International Journal of Sports Physical Therapy

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“…Data regarding the 114 exercises are available in Supplementary Table S2. This figure highlights both NHEs from Comfort et al [52] and barbell deadlifts from Andersen et al [59] with biceps femoris activation higher than 100% MVIC. Moreover, the slip leg exercise and the heel strike against ball exercise from Arias-Poblete et al [39] achieved 99% and 94% of BFlh activation, respectively.…”

Section: Muscle Activationmentioning

confidence: 74%

Biceps Femoris Activation during Hamstring Strength Exercises: A Systematic Review

Llurda-Almuzara

Labata-Lezáun

López-de-Celis

et al. 2021

IJERPH

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Background: The aim of the study was to systematically evaluate the biceps femoris long head activation across cross-sectional hamstring strength exercise studies. Methods: A systematic review design was followed. The search strategy conducted in PubMed, Cochrane Library, and Web of Sciences databases found a total of 3643 studies. Once inclusion and exclusion criteria were applied, 29 studies were finally included in this systematic review. A total of 507 participants and 114 different exercises were analyzed. Exercises were evaluated individually and grouped into several categories: Nordics, isokinetic exercises, lunges, squats, deadlifts, good mornings, hip thrusts, bridges, leg curls, swings, hip and back extensions, and others. Results: Results showed the isokinetic and Nordic exercises as the categories with highest biceps femoris activation (>60% of Maximal Voluntary Isometric Contraction). Nordic hamstring exercise ankle dorsiflexion was the exercise that achieved the highest biceps femoris long head activation (128.1% of its Maximal Voluntary Isometric Contraction). Conclusions: The results from this systematic review suggest that isokinetic and Nordic exercises seem to be the best option to activate biceps femoris long head. Future studies evaluating the implementation of these exercises in prevention programs are needed.

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“…For this purpose, a maximal voluntary contraction of the BF and ST was performed with the participant lying prone, with a knee flexion angle of 45º and a hip angle of 0º. 23 The lower leg was fixed in position and each participant completed three, five second maximal contractions whilst muscle activation was recorded. With the knee fixed at 90º flexion and the hip at 0º, 24 three further maximal contractions were performed for five seconds, to determine the maximal activation of the GM muscle.…”

Section: Methodsmentioning

confidence: 99%

Is neuromuscular inhibition detectable in elite footballers during the Nordic hamstring exercise?

Blandford

Theis

Charvet

et al. 2018

Clinical Biomechanics

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Lack of Effect of Ankle Position During the Nordic Curl on Muscle Activity of the Biceps Femoris and Medial Gastrocnemius

Cited by 13 publications

References 19 publications

Comparison of Common Methodologies for the Determination of Knee Flexor Muscle Strength

Comparison of Common Methodologies for the Determination of Knee Flexor Muscle Strength

Biceps Femoris Activation during Hamstring Strength Exercises: A Systematic Review

Is neuromuscular inhibition detectable in elite footballers during the Nordic hamstring exercise?

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