Loument Fitness Balls are amongst the strongest, most durable fitness balls on the market today. Posture & Performance: By adding a Fitness Ball to your workout, you vary the exercises you can perform in your total body workout routine. Stretching & Flexibility: Many stretching positions are difficult to maintain, but the curved surface of the Fitness Ball helps support the back during stretching. Strength & Muscle Tone: The Fitness Ball is one of the safest and most effective devices for improving muscle tone and strength in the abdominals and lower back. Pre & Post Natal Care: The Fitness Ball is a great birthing tool and the perfect addition to any expecting or new mother's fitness regime. It provides comfort for pregnant woman when sitting and is beneficial for gentle strengthening and stretching exercises.