The Gorilla Sports Medicine Ball is a great way to add fun and functional variety into your daily workout routines. Whether you're doing crunches, sit ups or squats, the medicine ball is designed to increase your overall strength and stability by adding extra weight to your exercises. The medicine ball is highly multi-functional. It can be used to target specific muscle groups and, through catching and throwing exercises, it can help to improve hand-eye coordination - making it the perfect addition to physical rehabilitation programs.