3 Exercises to Improve Shoulder Strength
The shoulder is the most mobile joint in the body. The unique and complex anatomy of the shoulder makes it to the joint with the greatest range of motion but the least stable. Given that it is so mobile, injuries are more common. Research shows that strength gains from using elastic resistance bands are similar to training with dumbbells or weight machines, benefiting not only the average person but also benefiting athletes. Resistance-band training can even increase the stabilizer muscles to a greater extent than weight training. This muscle group is important as it supports our larger muscles and joints during movement and helps us from getting injured. Strengthening them can improve movement and stability, and is why resistance bands are often used for rehabilitation. Below, Margo demonstrates 3 exercises that improve your shoulder strength with a resistance band.
Resistance Band Standing Row- This exercise targets your lats and rhomboids, as well as your middle and low trapezius. Avoid hunching your shoulders and keep your neck relaxed.
1. Anchor a resistance band around a doorknob or secure object.
2. Pull your arms towards you while pulling your shoulder blades down and back.
3. Bend your elbows to move your arms straight back to the sides of your ribs. Try not to arch your back or thrust your ribs forward.
4. Slowly and with control, allow your arms to reach back forward into the starting position. 
External Rotation-
1. While holding an elastic band at your side with your elbow bent, start with your hand near your stomach and then pull the band away. Keep your elbow at your side the entire time.
Internal Rotation-
1. While holding an elastic band at your side with your elbow bent, start with your hand away from your stomach, then pull the band towards your stomach. Keep your elbow near your side the entire time.
References:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6383082/
https://pubmed.ncbi.nlm.nih.gov/19387404/