Popsugar Fitness Workouts Floor Ab Workout Get Ready For Your Core to Combust in Just 3 Minutes! September 21, 2017 by Jenny Sugar View On One Page Photo 4 of 4 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 Cobra Lying on your belly, plant your hands underneath your shoulders and press the chest up, straightening the arms as much as you need to feel a stretch in the abs. Hold for 30 seconds and then release. Previous Next Start Slideshow WorkoutsStrength TrainingAb WorkoutsBeginner Workouts5-Minute Workouts