Popsugar Health & Fitness Workouts Four-Minute Ab Workout This Ab-Strengthening Plank Workout Is 100% Hard but 100% Good — Here's How to Do It 24 May, 2019 by Tamara Pridgett 0 Shares View On One Page Photo 1 of 3 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 WorkoutsBody WeightBeginner WorkoutsBodyweight Exercises5-Minute WorkoutsCore ExercisesStrength TrainingAb WorkoutsAb Exercises