Exercise balls: Ultra tough construction for perfect core workouts Do you love working out and rather than endless sit-ups, would like a super convenient way of performing back, stomach and core strengthening exercises. Would you like a super durable exercise ball with an ultra safe, high grip surface. If so, our exercise balls are the perfect choice. With an extra large diameter, our exercise balls are perfect for home workouts with a tough, rubberized surface allowing you to perform a range of balance and stability exercises to strengthen your abdominal muscles, perfect for use with yoga, pilates or for general strength and balance training. Ideal for the home gyms, our exercise balls are manufactured from ultra tough, burst resistant rubber, perfect for tough or weighted exercises, with a non-slip surface for safe, everyday use. Perfect for both men and women, our exercise balls are available in 45 cm, 55 cm, 65 cm, 75 cm and 85cm diameters and blue or black, for easy co-ordination with other workout equipment. Our exercise balls are premium quality, with a number of key benefits: Perfect for strengthening the abdominals, core and lower back muscles.