The V-sit is extensively practiced among gymnasts as it helps toughen the core and improve balance. Benefits of a V-sit It strengthens your core upper middle and lower abs. It helps improve your balance. It also works on the internal and external oblique muscles. Helps in building six and eight pack abs. How to do a V-sit? In a seated position start by placing your hands flat on the ground behind your back in line with your hips. Raise your legs slowly at an angle of 45 degrees. Slowly try to extend your hands forward in line with your shins.