Lie on your back on the floor holding a kettlebell in both hands with your arms fully extended above your chest. Engage your core and extend your legs up as high as you can. It's OK if your legs aren't completely straight and there is a slight bend in your knees.
Using your core muscles, lift your head and shoulder blades off the floor as you reach the kettlebell toward your toes.
Once you can no longer lift up higher, lower your body back down to the ground with control. Your arms and legs should remain as straight as possible throughout the entire movement.
