. When lifting the arm overhead, impingement of the subacromial space is avoided when:/2022

. When lifting the arm overhead, impingement of the subacromial space is avoided when:

  1. SYNERGISTIC ACTIONS OCCUR BETWEEN THE PECTORALS AND SUPRASPINATUS
  2. A MUSCULAR FORCE-COUPLE OCCURS BETWEEN THE DELTOID AND SUPRASPINATUS
  3. SYNERGISTIC ACTIONS OCCUR BETWEEN THE LATS AND DELTOID
  4. A MUSCULAR FORCE-COUPLE OCCURS BETWEEN THE DELTOID AND SUBSCAPULARIS