ArticleInternational journal of sports physical therapy2021
Comparison of Common Methodologies for the Determination of Knee Flexor Muscle Strength.
Article in International journal of sports physical therapy, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 1 of them a synthesis that pooled it.
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Who cites it
29 citing papers in PubMed, 1 synthesis or guideline pooled it, 51 citations in OpenAlex.
- Measurement Technologies for Ankle-Dorsiflexion Function After Stroke: A Systematic Review and Meta-Analysis of Sensing Approaches and Their Relationships with Gait Performance.Sensors (Basel, Switzerland) · 2026Pooled it
- Significant variability in limb symmetry across four different knee flexion strength tests after anterior cruciate ligament reconstruction.Journal of experimental orthopaedics · 2026Article
- Examining the Relationship Between Changes in Lower-Limb Isometric Strength and Subsequent Physical Training Outputs in Elite Australian Rules Football Players.Sports medicine - open · 2026Article
- Sex Differences in Knee Flexor Strength and Limb Symmetry Across Different Strength Testing Conditions in Healthy Recreational Athletes.Journal of clinical medicine · 2026Article
- The effects of an 8-week Exer-Genie-assisted speed and ABC drill training program on speed, hamstring strength, and vertical jump performance in female football players.BMC sports science, medicine & rehabilitation · 2026Article
- Eccentric Hamstring Strength and Interlimb Asymmetry in Professional Football Players: A NordBord-Based Longitudinal Analysis of Two Professional Teams.Life (Basel, Switzerland) · 2026Article
- Can We Predict Adductor Strain? A Predictive Analysis of a Major League Soccer (MLS) Cohort Spanning from 2019 to 2022.Journal of functional morphology and kinesiology · 2026Article
- Investigation of a Low-cost Portable Inline Dynamometer for Measuring Isometric Knee Extensor Strength.International journal of sports physical therapy · 2026Article
- Relationship Between Early and Maximal Isometric Upper-Body Push and Pull Force Production Among Elite Female and Male Swedish Track and Field Throwers.Sports (Basel, Switzerland) · 2025Article
- Hamstrings Volumetric Adaptations to a Four-Week Nordic Hamstring Exercise Protocol in Individuals with ACL Reconstruction: A Preliminary Case Series.International journal of sports physical therapy · 2025Article
- Maximal isometric and eccentric hamstring strength is influenced by body mass and additional load: Does the critical point at which peak knee flexor force is achieved play a role?Frontiers in physiology · 2025Article
- An Assessment of the Ratio between Upper Body Push and Pull Strength in Female and Male Elite Swedish Track and Field Throwers.Sports (Basel, Switzerland) · 2024Article
- Relationship between hamstring strength and hop performance at 8 and 12 months after ACL reconstruction with hamstring tendon autografts.BMC sports science, medicine & rehabilitation · 2024Article
- Muscle Morphology Does Not Solely Determine Knee Flexion Weakness After Anterior Cruciate Ligament Reconstruction with a Semitendinosus Tendon Graft: A Combined Experimental and Computational Modeling Study.Annals of biomedical engineering · 2024Article
- Article
- Reliability and Validity of the End Range Hamstring Strength Test with Handheld Dynamometry.International journal of sports physical therapy · 2024Article
- Handheld Dynamometer for Hamstring Strength Test Using Two Different Hand Placements/Methods: An Interrater Reliability Study.Rehabilitation research and practice · 2024Article
- Building Bridges Instead of Putting Up Walls: Connecting the "Teams" to Improve Soccer Players' Support.Sports medicine (Auckland, N.Z.) · 2023Article
- Impact of (long) COVID on athletes' performance: a prospective study in elite football players.Annals of medicine · 2023Article
- Knee flexor strength and symmetry vary by device, body position and angle of assessment following ACL reconstruction with hamstring grafts at long-term follow-up.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Article
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundKnee 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
designValidity and reliability study, test-retest design.
methodsForty-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
resultsLevel 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
conclusionCommon 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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