Br. Niebuhr et al., RELIABILITY OF GRIP STRENGTH ASSESSMENT WITH THE COMPUTERIZED JAMAR DYNAMOMETER, The Occupational therapy journal of research, 14(1), 1994, pp. 3-18
The purpose of our study was to determine the reliability of the model
PC5030PT computerized Jamar dynamometer (J.A. Preston, Jackson, MI).
A test-retest reliability study was conducted in which 33 normal subje
cts were tested three times over a 6-week period. Standard procedures
for assessing grip strength were followed. Both left and right hands w
ere tested. We quantified three characteristics of the force curve: (a
) the slope of the rise in force, (b) the maximal or peak force, and (
c) the mean sustained force over the last 3 sec of a 5-sec contraction
. Reliability was good with intraclass reliability coefficients rangin
g from .84 to .93. We conclude that the computerized Jamar will yield
reliable measurement of grip strength if the instrument is calibrated
properly and if standardized procedures for grip strength testing are
followed.