No one ever taught us to walk, stand up, reach overhead, or pick up objects in any specific way. The goal is always to just do it and go about your life. Our movement strategy choices in all of these day-to-day activities accumulate towards longevity or degeneration of musculoskeletal health. The serratus anterior is a key muscle when it comes to treating/preventing shoulder impingement and related injuries.
The serratus anterior muscle is important particularly in its role of posteriorly tilting the scapula, which prevents “winging” and decrease in the subacromial space when raising the arm up. In other words, this muscle should be strong and engaging whenever you reach overhead, load the arm, lift or carry objects above the waist. Escamilla et al states that “if normal scapular movements are disrupted by abnormal scapular muscle firing patterns, weakness, fatigue, or injury, the shoulder complex functions less efficiency and injury risk increases”.
See below for examples of neuromuscular activation and strength training of the serratus anterior.
REFERENCES:
Escamilla RF, Yamashiro K, Paulos L, Andrews JR. Shoulder muscle activity and function in common shoulder rehabilitation exercises. Sports Med. 2009;39(8):663-685. doi:10.2165/00007256-200939080-00004.