For 30 to 60 seconds, keep your stomach tight while maintaining a straight posture on your elbows and toes.
While you pretend to pedal a bike, lie on your back and touch your elbow to the knee on the other side.
Laying down, raise your legs to the ceiling and slowly descend them so they don't touch the floor.
Quickly bring one knee to your chest while performing a push-up, then quickly switch legs as though you were running.
Take a seat, raise your feet, sag back, and rotate your upper body in a lateral motion.
Raise your upper body and legs simultaneously, attempting to form a "V" with your body as you approach your toes.
Maintain a flat posture, raise your legs slightly off the ground, and rapidly kick up and down without contacting the floor.