What is the balance ball? a balance ball is known as a versatile fitness device that delivers killer cardio workouts, improves balance and flexibility, builds strength, and fine-tunes sport skills.using our half balance ball dome side up provides an ever-changing, unstable, dynamic surface while the device itself remains stable. this element of instability is what creates the added challenges during exercises and is what makes the ball so effective, and fun, as a fitness device. our balance ball delivers an ever-changing dynamic surface that you can stand on, jump on, kneel on, and lay on, to perform exercises to train and challenge every part of your body. increase strength: using our balance trainer while doing weight training exercises helps to build strength faster. add hand-held weights while lying on the ball to perform arm, shoulder and chest exercises. stand on the ball to perform squats, lunges or other leg exercises. the increased weight forces the engagement of more muscles and helps to improve strength. push-ups on the balance trainer can be performed dome side up or dome side down depending on the intensity desired. improve balance: using our balance trainer forces you to maintain your centre of gravity while performing any exercise and is an excellent way to prepare and tone your body for everyday life, athletic skills and help prevent injury. strength core muscles: do you eager to tremendously improve your coordination, body awareness, muscle strength and flexi