Shoulder health is not just about flexibility. A healthy shoulder needs mobility, strength, endurance, timing, coordination, and control. That is especially true if you lift weights, play tennis or pickleball, golf, climb, swim, mountain bike, ski, throw, work with your hands, or spend long hours at a desk. One simple tool that can challenge the shoulder in a unique way is the gyro ball. A gyro ball creates rotational resistance that changes as the ball spins. To keep it movi