"Shoulder impingement" refers to a condition where the muscles and tendons in the shoulder become compressed or pinched when moving the arm. This can cause pain, inflammation, and limited movement in the shoulder joint. Full definition
The Use of Ultrasound Images in Manual Therapy and Additionally in Assessment of Shoulder Impingement Syndrome (scirp.org)
[3] Building up adequate levels of mobility in your joints through proper warm - ups can significantly decrease the risk of shoulder impingement, hip and lower back injuries, elbow pain, etc.. (ahealthblog.com)
Many also get shoulder impingement that causes constant pain when raising your arm over head and external rotation. (fitnsync.com)