Reliability and Validity of a New Eccentric Hamstring Strength Measurement Device

Muscle strength is an important clinical outcome in rehabilitation and sport medicine, but options are limited to expensive but accurate isokinetic dynamometry (IKD) or inexpensive but less accurate hand-held dynamometers (HHD). A wearable, self-stabilizing, limb strength measurement device (LSMD) was developed to fill the current gap in portable strength measurement devices. The purpose of this study was to evaluate the reliability and validity of the LSMD in healthy adults. Twenty healthy adults were recruited to attend two strength testing sessions where elbow flexor and extensor strength was measured with the LSMD, with HHD and with IKD in random order, by two raters. Outcomes were intra-rater repeatability, inter-rater reproducibility and inter-session reproducibility using intra-class correlation coefficients (ICC). Limits of agreement and weighted least products regression were used to test the validity of the LSMD relative to the criterion standard (IKD), and calibration formulas derived to improve measurement fidelity. ICC values for the LSMD were >0.90 for all measures of reliability and for both muscle groups, but over-predicted extensor strength and under-predicted flexor strength. Validity was established by transforming the data with the criterion standard-based calibration. These data indicate that the LSMD is reliable and conditionally valid for quantifying strength of elbow flexors and extensors in a healthy adult population.

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Measuring Eccentric Strength of the Shoulder External Rotators Using a Handheld Dynamometer: Reliability and Validity

Journal of Athletic Training ◽

10.4085/1062-6050-49.3.72 ◽

2015 ◽

Vol 50 (7) ◽

pp. 719-725 ◽

Cited By ~ 31

Author(s):

Fredrik R. Johansson ◽

Eva Skillgate ◽

Mattis L. Lapauw ◽

Dorien Clijmans ◽

Valentijn P. Deneulin ◽

...

Keyword(s):

Intraclass Correlation ◽

Reliability And Validity ◽

Correlation Coefficients ◽

Testing Procedure ◽

Return To Play ◽

Special Importance ◽

Strength Measurement ◽

Isokinetic Testing ◽

Strength Assessment ◽

Measurement Protocol

Context Shoulder strength assessment plays an important role in the clinical examination of the shoulder region. Eccentric strength measurements are of special importance in guiding the clinician in injury prevention or return-to-play decisions after injury. Objective To examine the absolute and relative reliability and validity of a standardized eccentric strength-measurement protocol for the glenohumeral external rotators. Design Descriptive laboratory study. Setting Testing environment at the Department of Rehabilitation Sciences and Physiotherapy of Ghent University, Belgium. Patients or Other Participants Twenty-five healthy participants (9 men and 16 women) without any history of shoulder pain were tested by 2 independent assessors using a handheld dynamometer (HHD) and underwent an isokinetic testing procedure. Intervention(s) The clinical protocol used an HHD, a DynaPort accelerometer to measure acceleration and angular velocity of testing 30°/s over 90° of range of motion, and a Biodex dynamometer to measure isokinetic activity. Main Outcome Measure(s) Three eccentric strength measurements: (1) tester 1 with the HHD, (2) tester 2 with the HHD, and (3) Biodex isokinetic strength measurement. Results The intratester reliability was excellent (0.879 and 0.858), whereas the intertester reliability was good, with an intraclass correlation coefficient between testers of 0.714. Pearson product moment correlation coefficients of 0.78 and 0.70 were noted between the HHD and the isokinetic data, showing good validity of this new procedure. Conclusions Standardized eccentric rotator cuff strength can be tested and measured in the clinical setting with good-to-excellent reliability and validity using an HHD.

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Validation of a new strength measurement device for amyotrophic lateral sclerosis clinical trials

Muscle & Nerve ◽

10.1002/mus.22253 ◽

2011 ◽

Vol 45 (1) ◽

pp. 81-85 ◽

Cited By ~ 25

Author(s):

Patricia L. Andres ◽

Linda M. Skerry ◽

Theodore L. Munsat ◽

Brenda J. Thornell ◽

Jackie Szymonifka ◽

...

Keyword(s):

Clinical Trials ◽

Amyotrophic Lateral Sclerosis ◽

Strength Measurement ◽

Measurement Device ◽

Lateral Sclerosis

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Reliability and Validity of a Cervical Muscle Strength Test using a Load-cell-type Strength Measurement Sensor

Korean Academy of Clinical Movement Therapy ◽

10.52901/ppms.2021.1.2.17 ◽

2021 ◽

Vol 1 (2) ◽

pp. 17-25

Author(s):

Jeong-Hoon Lee ◽

Jong-Gil Seo ◽

Byeong-Jin Kim ◽

Jae-Seop Oh

Keyword(s):

Muscle Strength ◽

Reliability And Validity ◽

Strength Test ◽

Load Cell ◽

Cell Type ◽

Strength Measurement ◽

Measurement Sensor ◽

Cervical Muscle

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Reliability and validity of measuring grip strength with a robotic-assisted device in patients after stroke

International Journal of Therapy and Rehabilitation ◽

10.12968/ijtr.2019.0018 ◽

2020 ◽

Vol 27 (3) ◽

pp. 1-10

Author(s):

Stefan J Ortmann ◽

Jürg Kesselring ◽

Jan Kool

Keyword(s):

Grip Strength ◽

Hand Function ◽

Intraclass Correlation ◽

Reliability And Validity ◽

Robotic Device ◽

Strength Measurement ◽

Cross Sectional ◽

Rater Reliability ◽

Robotic Assisted ◽

Grip Strength Measurement

Background/Aims Robotic assisted devices are increasingly used in neurological rehabilitation for improving upper extremity function. The new hand therapy device Manovo Power of the Armeo Power provides integrated assessment of grip strength measurement. Reliability and validity of the grip strength measurement are unknown. The aim of this study was to evaluate the reliability and validity of grip strength measurement with the hand module of the Manovo Power robot-assisted device compared with a Biometrics E-Link hand-grip dynamometer. Methods This was a cross-sectional study design with grip strength measurements taken once a day for a total of 3 days, with a 2-day interval in between each test. Participants of the study were patients <24 months after first stroke with reduced hand function (n=51). Relative reliability was evaluated using intraclass correlation coefficients (ICC) (2,1). Satisfactory reliability was defined as an ICC>0.8. Absolute reliability was evaluated using limits of agreement (LoA). Validity was supported if the correlation between measures with the two devices was >0.6. Results The robotic device had good intra-rater reliability (ICC=0.89, 95% confidence interval [CI] 0.81–0.94, LoA 1.23–1.16) and inter-rater reliability (ICC=0.91, 95% CI 0.85–0.95, LoA 1.01–1.23). Intra-rater reliability of the Biometrics E-Link grip strength dynamometer was higher compared with the robotic device (ICC=0.98, 95% CI 0.96–0.99, LoA 3.94–4.42). Validity was confirmed by a correlation between devices of 0.76 (95% CI 0.60–0.85). Conclusions Measurement of grip strength with the robotic device was reliable and valid in patients with stroke and impaired hand function. There was no absolute measurement error that might have indicated a learning effect. Reliability was higher for the Biometrics E-Link grip strength dynamometer compared with the robotic-assisted device. Using the robotic device for grip strength measurement in patients who exercise with that device saves time and increases efficiency.

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