This Resistance Band Reverse Fly Exercise Shoulder Upper Body Exercise is very good for strengthening the upper arm and back muscles. These groups of muscles are triceps and traps. 

Just remember the start position is arms fully stretched out in front of body with. Try to keep the arms as straight as possible throughout this exercise. I find its always easier to use a lower weight band for this exercise and maintain a controlled movement throughout the exercise. 

Remember

Keep a slight bend at the knees and feet in line with shoulders. Keep arms in same position during exercise.

Fitness health is not responsible for any accidents caused during training.

We recommend that you consult a doctor before completing any training.

Always stop if you feel sharp pain or sickness.

Always warm up and cool down before exercising.