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Accuracy and Reliability of Grip Strength Measurements: A Comparative Device Analysis.
Pascale Gränicher1,2, Yael Maurer1,3, Jörg Spörri1,4
1University Center for Prevention and Sports Medicine, Balgrist University Hospital, University of Zurich, CH-8008 Zurich, Switzerland.
Journal of Functional Morphology and Kinesiology
|December 27, 2024
Summary
New grip strength devices show excellent reliability for functional status assessments. However, the Martin Vigorimeter differs significantly from the JAMAR® Hydraulic, advising against interchangeable use.
Area of Science:
- Biomedical Engineering
- Rehabilitation Science
- Clinical Measurement
Background:
- Grip strength is a key indicator of functional status.
- The JAMAR® Hydraulic Dynamometer is the gold standard but has limitations.
- Alternative devices like JAMAR® Smart and Martin Vigorimeter require validation.
Purpose of the Study:
- Assess comparability of JAMAR® Smart and Martin Vigorimeter against the JAMAR® Hydraulic.
- Examine intrasubject and intersession reliability of these devices.
- Ensure quality control for normative data generation.
Main Methods:
- Observational study with 40 healthy participants.
- Grip strength measured using JAMAR® Hydraulic, JAMAR® Smart, and Martin Vigorimeter.
- Five attempts per device; subset retested for reliability.
Main Results:
- Excellent intrasubject reliability (ICC3,1: 0.91-0.97) and intersession reliability (ICC3,1: 0.85-0.97) for all devices.
- Strong correlations (r = 0.68-0.98) with JAMAR® Hydraulic.
- Martin Vigorimeter showed increased differences, especially at extreme values.
Conclusions:
- JAMAR® Smart and Martin Vigorimeter are suitable for test-retest analysis with 2-3 attempts.
- High correlations exist between devices, but agreement varies.
- Caution is advised against using the Martin Vigorimeter interchangeably with the JAMAR® Hydraulic.
Keywords:
hand strengthphysical therapyreproducibility of resultstest-retest reliabilityvalidation studiesMore Related Videos
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