Gym ball from Phoenix Fitness is ideal for performing a range of exercises and is designed to improve balance and coordination, as well as strengthen core muscles. Perfect for use at home or in the gym. Brand new to the Phoenix Fitness Pink Range! Inflatable fitness ball with pump included. Ideal for performing a range of exercises designed to improve balance and strengthen core muscles. Great for use at home or in the gym. Perfect for your warm up routine. Can be deflated for easy transportation and storage.