Fitness balls develop overall muscle tone for the whole body. They also help users recover comfortably from back and hip injuries, and offer effective core workouts—enhancing stability and muscle balance. Training with fitness balls is not only a good way to improve flexibility and cardio health, it’s also highly effective at supporting and building hard-to-reach muscles. Using SPRI stability stretch balls promotes good posture and coordination. They challenge people of all ages and fitness levels with a wide variety of different applications, such as sports conditioning, rehab and pre- or post-natal recovery. The Bosu balance trainers support squats, bicep curls, shoulder raises and crunches. They strengthen, trim and tone while improving balance.