Introduction: The scapula is a flat blade lying along the thoracic wall. It is central in proficient shoulder activity providing a stable base from which glenohumeral (GH) mobility occurs [1]. Any abnormal biomechanics and physiology occurring around the shoulder create abnormal scapular position and motions termed as scapulothoracic dyskinesis [13,8] ‘floating scapula’ or lateral scapular slide [4]. As rotator cuff functions to depress the humeral head within the glenoid cavity where as scapula rotators position the glenoid in proper place for stability with arm motion [6,4]. Fatigue represents the decline in muscle tension(force) capacity with repeated stimulation hence muscular fatigue worsen or impair joint position sensibility and deterioration in muscle conductivity, contractile and elastic properties [8]. Need for the study: The study was undertaken to determine the effect of fatigueness on scapular positioning after exercise and to understand the importance of using fatigue as rehabilitation tool for safe return of athlete to competitive performance level. Methodology: There are two groups Group A- Right side Dominant shoulder of the same 30 individuals assessed with LSST, MVIC and were given exercise in D2 flexion pattern i.e. shoulder flexion, adduction and external rotation till fatigueness. Group B- left side non-dominant shoulder of the same 30 individuals assessed with LSST, MVIC and given exercise in D2 flexion pattern i.e. shoulder flexion, adduction and external rotation till fatigueness. Limitations: 1. The study comprises of a small sample size. 2. The study could not be able to do over the overhead throwing athlete. 3. In my study I checked the lateral scapular slide immediately 1min. after the exercise but could not recheck it again after few min or hours in the same day. 4. I neither compare nor correlate the results with the actual muscle activity and power of the muscular, which are responsible for abnormal scapular position. Scope of Future Study: 1. Further studies can be done in a well set up laboratory with the usage of Biodex dynamometer for accurate estimation of isometric strength at various degrees 2. Future study can be done on population having proprioceptive loss due to some injury or degeneration. 3. The effect of exercise on scapular stability can be seen for longer period of time i.e., 30 min-1hr or any particular time of the day. 4. Further studies can be done to correlate among larger group of subjects. Conclusion: The study concluded that a fatigue induced strength deficit of the shoulder musculature can have an adverse affect on scapular positioning by allowing the scapula to glide more laterally during functional activities. It also come to the conclusion that increase displacement of scapula as a result of fatigue of the shoulder girdle could interfere with normal coordination and joint stability thus can impair function around the shoulder girdle. Thus rotator cuff strengthening has been an obvious treatment for various pathologies. 

Keywords: LSST; MVIC and D2 Flexion Pattern; Strain Gauge; Goniometer; Wrist Cuff; Stationary Frame; Hooks And Inch-Tape.