Popsugar Health & Fitness Fast Fitness 10-Minute Core and Abs Workout This 10-Minute Core Workout Will Leave Your Abs Worked 15 November 2018 by Susi May View On One Page Photo 2 of 10 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 Fast FitnessFast Fitness WorkoutsBodyweight ExercisesBodyweight WorkoutsIntermediate WorkoutsAb Workouts10-Minute WorkoutsStrength TrainingWorkouts