Brace Your Core Before Every Exercise
Your core is much more than a six-pack of muscles hiding beneath your gut — it’s a system of muscles that wraps around your entire torso, stabilizing your body, protecting your spine from injury and keeping you upright. Fire these muscles before every exercise to keep your back healthy, steady your balance and maintain a rigid body position. You’ll get the added bonus of isometric exercise for your middle, which could reveal the muscles in your core you’d like everyone to see.
Source: www.livestrong.com