Handgrip Strength: A Population-Based Study of Norms and Age Trajectories for 3- to 17-Year-Olds

Abstract

PURPOSE: To provide normative values and equations for grip strength obtained from a population-based sample of individuals 3 to 17 years of age. METHODS: This cross-sectional study used grip strength data from 2706 participants (49.2% males, 91% right-hand dominant) in the normative phase of the National Institutes of Health Toolbox project. RESULTS: Analyses showed greater strength in the dominant hand in boys and with each yearly increase in age. Normative data are presented separately for each side, sex, and age. Separate regression equations using age and weight as explanatory variables of grip strength are provided for each side by sex. CONCLUSIONS: The normative data can serve as a guide for interpreting grip strength measurements. The trajectories can be used to investigate the effect of various pathologies and conditions on grip strength during physical maturation.

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