Prior to performing the selected exercises, a maxi- mum voluntary isometric contraction (MVIC) of the serratus anterior was recorded during a manual muscle test in the position described by Kendall.
Subsequently, each subject performed the 3 selected movements: scapular plane shoulder elevation, wall slide exercise, and the push-up plus against the wall.
For scapular plane shoulder elevation, subjects started with arms at their sides with palms facing the body and thumbs up.