Popsugar Fitness Workouts Four-Minute Ab Workout This Ab-Strengthening Plank Workout Is 100% Hard but 100% Good — Here's How to Do It May 28, 2019 by Tamara Pridgett View On One Page Photo 1 of 4 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 High Plank Start resting on all fours. With your palms flat, raise up off your knees onto your toes. Keep your hands directly below your shoulders. Contract your abs to keep yourself up and prevent your bottom from sticking up. Remember to keep your belly button pulled in. With your head and spine in line, keep your back flat — don't let it curve. Picture your body as a long, straight board. Hold for 30 seconds. Previous Next Start Slideshow WorkoutsStrength TrainingBodyweight ExercisesAb WorkoutsCore ExercisesBeginner Workouts5-Minute WorkoutsAb Exercises