Here is a great hamstring stretch. Start in seated position and step back to a runner’s “on your mark” position. Press your heels toward the ground, hip distance apart.
Extend your arms out (shoulder width apart) and splay your fingers. Now imagine a clock under each hand and slightly rotate your right upper arm bone (humerus) clock-wise and your left counter clock-wise.
This helps to prevent a joint collision with the coracoid processes. Coracoid is located in the outer edge of the shoulder blade and sticks out like a little spike. Excess joint pressure from collisions can excessively wear and tear the connective tissue in joints and should be avoided in all yoga poses.