Stretching for racquetball is all about improving flexibility, mobility, and injury prevention, especially in the shoulders, wrists and legs 1. Shoulder & Chest Stretches Cross-body shoulder stretch: Pull one arm across your chest and hold with the opposite arm. 20s Chest doorway stretch: Place your hands on a doorframe and lean forward to stretch your chest and front shoulders. 20s Overhead triceps stretch: Reach one arm overhead and down your back, push elbow gently with opposite hand.