Get in push-up position and hold for 30 seconds.
Advanced option: Balance on your elbows, hold for up to one minute. During each of these moves, keep your abs and back muscles actively engaged.
Lie on your side with your shins perpendicular to your quads and prop up on your elbow. Lift your butt off the floor and hold for 30 seconds; switch sides.
Advanced option: Keep your legs straight.
Get in a crawl position, on your hands and knees. Lift and extend your right hand and left leg off the ground and keep your back flat like a tabletop. Hold for 30 seconds and switch.
Advanced option: After extending your hand and leg (hold for ten seconds), bring your elbow toward your knee so they’re almost touching under your stomach. Repeat six to ten times.
Lie facedown on the floor with your hands extended forward, away from your head. Lift your right arm and left leg. Hold for 10 seconds and switch.
Advanced option: Lift both hands and feet at same time.
Lie on your back on the floor with your knees bent. Lift your butt by slowly curling your spine off the ground. Hold for 30 seconds.
Advanced option: Lift one leg.