Challenge your entire body with integrated, multi-joint movements by incorporating the Bosu Multi-Functional Strength Trainer Ball into your workout routine. The ever-changing moving surfaces force engagement of core muscles to keep yourself stable, strengthening the body and improving overall balance. Use the dome or platform side down, combine with other equipment, or use the ball alone to make any exercise fun. The versatility and unstable surfaces encourage injury prevention and rehabilitation through strength and conditioning movements. Yoga poses can be done with the trainer to increase difficulty or improve flexibility. Designed with a 26-inch diameter, this durable fitness equipment is made with burst-resistant materials. Whether in the gym, at home, or in rehabilitation facilities, this Pro Multi-Functional Strength Trainer Ball from Bosu builds strength, tones muscles, enhances flexibility, and delivers a killer cardio workout.