This exercise should be mandatory for people who sit at desks. 
It’s called the Band Pull Apart.
When you sit for long periods your back muscles tend to round and weaken.
One of the best exercises you can do to strengthen your upper back is the Band Pull Apart.
It develops the muscles in the mid to upper back. Over time this can improve posture and create a more stable body.
See Dan Go demonstrating the Band Pull Apart.
Use a light band. Aim to do 15 to 20 reps for 1-3 sets 3x a week
Your body will thank you.
– Dan Go
