Isometric muscle strength in children and adolescents using Handheld dynamometry: reliability and normative data for the Brazilian population.

Objective: Isometric muscle strength measured by Handheld dynamometer indicates physical ability. There is no normative data for the Brazilian population. This study aims (a) to describe the development of isometric muscle strength in healthy children and adolescents 5-15 years of age; (b) to evaluate Handheld dynamometer inter and intra-rater reliability.