Contextual overview
Positioning is critical for valid shoulder assessment. By recommending 90° of abduction, this research provides a clear protocol for reducing measurement error and ensuring that clinical tests capture the athlete's true maximal torque capacity.
Original publication abstract
Chamorro et al. (2018) investigated the influence of assessment position on the reliability of shoulder strength tests using a pulley electromechanical dynamometer. The study recommends testing at 90° of abduction, as it provides superior reliability and lower error for both internal and external rotators compared to 40°.
Check the original article for the population, device, protocol and limitations before applying its results to a different configuration.