Document Detail

Optimal jamar dynamometer handle position to assess maximal isometric hand grip strength in epidemiological studies.
MedLine Citation:
PMID:  23101534     Owner:  NLM     Status:  In-Data-Review    
PURPOSE: Hand grip strength is an indicator of general muscle strength that is measured using a hand dynamometer. In some studies, a subject's grip strength is taken to be the maximal grip strength achieved from measurements taken at several different dynamometer handle positions. However, little is known about the influence of these different positions on the measured grip strength. The aim of the study was to identify one standard handle position that could be used to assess the grip strength of all subjects.
METHODS: Grip strength was assessed with a hand dynamometer (Jamar Plus+; Sammons Preston, Rolyon, Bolingbrook, IL). Each participant's grip strength was measured 3 times in each of 5 different handle positions with each hand. The best position for each participant was defined as the position at which they achieved maximal grip strength.
RESULTS: The mean (± standard deviation) age of the 50 participants was 41 (± 13) years. Maximal grip strength was 43.7 (± 12.4) kg for all participants; 55.0 (± 10.2) kg for men and 35.4 (± 5.2) kg for women. Handle position 2 was the best position for 70% of participants. The mean difference between the grip strength achieved by each participant at handle position 2 and that achieved at each participant's best position was 0.8 (± 1.78) kg.
CONCLUSIONS: Our results show that measurements taken at a single standard handle position are sufficiently accurate to assess grip strengths for all subjects. We therefore recommend handle position 2 as the standard position for measuring grip strength with the Jamar Plus+ hand dynamometer.
CLINICAL RELEVANCE: The assessment of grip strength with the Jamar Plus+ dynamometer is easier and faster if a single, standard handle position is used rather than multiple different positions. As well as providing accurate results, a single, standard handle position also reduces fatigue and increases the comparability of results between subjects.
Ulrike Sonja Trampisch; Julia Franke; Nina Jedamzik; Timo Hinrichs; Petra Platen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of hand surgery     Volume:  37     ISSN:  1531-6564     ISO Abbreviation:  J Hand Surg Am     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-10-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7609631     Medline TA:  J Hand Surg Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2368-73     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 American Society for Surgery of the Hand. Published by Elsevier Inc. All rights reserved.
Department of Medical Informatics, Biometry and Epidemiology and Department of Sports Medicine and Sports Nutrition, Ruhr-University Bochum, Bochum, Germany; Institute of Sports and Preventive Medicine, University of Saarland, Saarland, Germany. Electronic address:
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