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Muscle Nerve. 2015 Jan;51(1):102-5. doi: 10.1002/mus.24264. Epub 2014 Nov 19.

Identification of dynapenia in older adults through the use of grip strength t-scores.

Author information

1
Physical Therapy Program, Department of Kinesiology, Neag School of Education, University of Connecticut, 358 Mansfield, U-2101, Storrs, Connecticut, 06269-2101, USA.

Abstract

INTRODUCTION:

The aim of this study was to generate reference values and t-scores (1.0-2.5 standard deviations below average) for grip strength for healthy young adults and to examine the utility of t-scores from this group for the identification of dynapenia in older adults.

METHODS:

Our investigation was a population-based, general community secondary analysis of cross-sectional grip strength data utilizing the NIH Toolbox Assessment norming sample. Participants consisted of community-dwelling adults, with age ranges of 20-40 years (n = 558) and 60-85 years (n = 390). The main outcome measure was grip strength using a Jamar plus dynamometer.

RESULTS:

Maximum grip strengths were consistent over the 20-40-year age group [men 108.0 (SD 22.6) pounds, women 65.8 (SD 14.6) pounds]. Comparison of older group grip strengths to those of the younger reference group revealed (depending on age strata) that 46.2-87.1% of older men and 50.0-82.4% of older women could be designated as dynapenic on the basis of t-scores.

CONCLUSIONS:

The use of reference value t-scores from younger adults is a promising method for determining dynapenia in older adults.

KEYWORDS:

age; hand grip dynamometer; hand strength; measurement; muscle weakness

PMID:
24729356
PMCID:
PMC4194263
DOI:
10.1002/mus.24264
[Indexed for MEDLINE]
Free PMC Article

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