The validity of the sphygmomanometer for shoulder strength assessment in amateur rugby union players.

Objectives: To determine the concurrent validity of a sphygmomanometer for assessing shoulder strength in the I, Y and T positions during the athletic shoulder test (ASH test). Force platforms were used as the gold standard measurement tool for this purpose.

Design: Shoulder strength was assessed using force platforms and a sphygmomanometer, both placed on the floor and the participant positioned prone.