Develop your core and improve your posture with the Core Balance Anti-Burst Gym Ball. Supplied with a hand pump and tape measure to easily inflate to the correct size, it's a highly effective and versatile exercise aid, which you can easily incorporate into your daily workout. /// The gym ball is made from extra-thick, anti-burst PVC material for enhanced durability. Should it get punctured, it will slowly deflate rather than popping. It also has anti-slip lines running around its perimeter to prevent it slipping and rolling under your weight when you're exercising. How The Gym Ball Works Because it's round and inflatable, the gym ball is unstable to sit, lie or lean on when performing exercises, such as sit ups, curls, planks or yoga postures. This constantly engages your core as your muscles work overtime to keep you balanced and prevent you rolling off the sides. Gym Ball Size Guide When buying a gym ball, it's important that it's the correct diametrical size in correlation to your height. When you sit on the gym ball, your knees should be bent at a 90-degree angle and your thighs should be parallel with the ground. We've compiled a size guide to help you choose. 55cm Gym Ball: Suitable for people with a height of 4'8" to 5'3". 65cm Gym Ball: Suitable for people with a height of 5'4" to 5'10". 75cm Gym Ball: Suitable for people with a height of 5'10" to 6'4". 85cm Gym Ball: Suitable for people with a height of 6'4" and above. Even sitting on a gym ball engages your core, boosts your balance and improves your posture, which is why many people use gym balls as office chairs. If you plan on using your gym ball as a chair, we recommend buying a gym ball one size larger than you would for typical exercise. Setting Up Your Gym Ball To get the best out of your gym ball, it's important that you set it up correctly. We recommend inflating your gym ball to around 80% of its recommended size. Allow the material to stretch for 24 hours and then finish inflating it to the recommended size. For personal safety, ensure it isn't completely solid and has a little give. It should create a bit of a seat when you sit on it. Core Balance Exercise Gym Ball Develop your core and improve your posture Constantly engages your core when exercising Use as an office chair to relieve back pain Made from durable anti-burst PVC material Deflates slowly when punctured, rather than popping Anti-slip to prevent it sliding around when exercising Hand inflation pump for fast and easy inflation Tape measure with hole to inflate to correct diameter Plug to prevent it deflating (spare plug included) Removal tool to easily remove the plug for deflation Supports a maximum weight capacity of 250kg Four sizes available: 55cm, 65cm, 75cm, 85cm
