Skydiver with arms in T-position

Lie on your stomach with your legs more than shoulder-width apart and your feet up. Your arms are stretched out to the side and form a T with your upper body, your palms are on the floor. Now raise your upper body, arms and legs as high as you can while keeping your body under tension. Turn your thumbs towards the ceiling and pull your shoulder blades together. While keeping your upper body and all limbs in the air, bring your legs together and then spread them again, keeping them constantly in the air. For the remaining repetitions, only move your legs open and closed.