The goal of this exercise is to improve chest muscle flexibility ... so you may not need it if you already have decent shoulder mobility. That said, if you have painful or very tight shoulders ...
Repeat to improve shoulder mobility. The main difference between mobility and flexibility or stretching is that “mobility is active, while flexibility is passive,” explains Fata-Chan.
Fortunately, specific exercises can help alleviate the stiffness and improve mobility over time. This exercise helps to gently loosen the shoulder joint using passive movement. How to do it ...