While holding a medicine ball with both hands, lie flat on your back with legs straight and arms extended past your head. Tighten abs and bring your legs and arms up to form a V. Try to touch the ball with your feet. Hold for one count and return to the starting position before repeating the move.
Do this exercise with the best exercise equipment. We recommend using a bluetooth chest strap heart rate monitor or a smartwatch for more training optimization & performance tracking.