Popsugar Fitness Workouts 10-Minute Core and Abs Workout This 10-Minute Core Workout Will Leave Your Abs Worked December 1, 2018 by Susi May View On One Page Photo 2 of 11 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Elbow Plank This isometric exercise builds core strength and can help improve your posture too. Come into a plank with your forearms on the floor and your elbows directly under your shoulders. Contract your abdominals to keep your torso stable. Hold for 30 seconds. Previous Next Start Slideshow WorkoutsStrength TrainingBodyweight ExercisesBodyweight WorkoutsAb Workouts10-Minute WorkoutsIntermediate Workouts