Molenaar, H.M.

strength children measurement grip strength hand strength thumb dynamometer reliability nondominant protocol study group abduction value difference finger patient table diagram muscle model lode dynamometer subject growth pinch reference grip strength dynamometer hand myometer instrument function strength measurements measure martin vigorimeter reference values growth diagrams grip strength measurements index chapter opposition error rotterdam feedback hand function nondominant hand correlation weight adult stam hj force suspension figure suspension protocol hand strength measurements effect martin measurement error vigorimeter j hand method palmar age groups child feedback protocol myometer 12 years thumb opposition newton contraction hand nondominant hand retest jamar dynamometer gender jamar addition variance american society change population interval result