Electromyographic activity of the support arm utilized in the upper quarter y balance test: a descriptive study

The Upper Quarter Y-Balance Test (YBT‐UQ) is a closed-chain upper extremity test for assessment of unilateral upper extremity function to identify limitations and asymmetries in the reaching and the stabilizing limb. Whereas several aspects of the test have been examined (reliability, validity, correlations to other functional tests), activity of the muscles utilized has not. Electromyographic activity recorded for scapular and humeral muscles during the performance of the test on healthy participants will be described.