The minor body structure muscles are sometimes overlooked in favor of building the massive house muscles such as the pecs, triceps, and biceps. You will, nevertheless, if you avoid the difficult body part muscles. This could have negative consequences not only in your daily routine, but also in other pursuits.
Tying a band to a door handle is a regular exercise that helps to strengthen the medial rotator. Then, bend your elbows to 90 degrees and hang on to the band, ensuring that the band is taut. Turn your elbow inwards, against the resistance of the band across your torso, with your elbow bent to 90 degrees. This will assist in stretching your shoulder.