Set yourself up so you can grab onto something sturdy behind you with bent arms. Pull your low abs in (so your lower back in flush with the floor) and create tension in upper body and your lats (side back muscles). Straighten your legs. Use your lower abs and back muscles to actively pull your legs up and your feet towards your head lifting your lower back off the floor and pushing your upper back into the ground (shift your weight into your shoulders). Pause for a moment at the top, bend your knees and lower back down towards the floor with as much control as you can. Reset and repeat.

Shoulders, Mid Back, Core - Abdominals, Hip Flexors