A comparison of two portable dynamometers in the assessment of shoulder and elbow strength

Conclusions Although time taken and discomfort should be considered in the selection of dynamometers, due consideration should be given to the significant differences in absolute results. Neither the dynamometers nor the testers can be considered interchangeable. Both the intra- and inter-observer reliability of the two dynamometers were similar, yet both demonstrated systematic bias and variability in the measurements obtained.