The effect of arm abduction angle and contraction intensity on perceived exertion

The objective of the present investigation was to examine the effects of voluntary contraction intensity and arm elevation angle on ratings of perceived exertion in healthy young adults. Twelve healthy young adults participated in six separate experimental sessions, during which maximal and sub-maximal arm abduction contractions were performed at one of the following randomly assigned arm angles: 15°, 30°, 45°, 60°, 75°, and 90° arm angles (degrees). The sub-maximal arm abduction contractions (10 s) were performed to target intensities ranging from 10 to 90% of the maximal voluntary contraction (MVC), in randomly ordered 10% increments. Perceived exertion was sampled with a modified Borg category-ratio scale immediately, following each sub-maximal contraction. Voluntary arm abduction torque was significantly ( p