Popsugar Fitness Workouts Quick 5-Minute Core Workout Tack This 5-Minute Core Blaster Onto the End of Your Cardio Workout June 26, 2018 by Jenny Sugar View On One Page Photo 3 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 Side Plank Leg Lift Place your right elbow on the ground. Or for a more advanced version, do this with your bottom arm straight, resting on the hand. Extend both legs out so that your body is in one straight line and you're balancing on the outside edge of your right foot. Flex both feet if you can and either rest your top hand on your upper hip or extend it in the air. Keeping your spine lengthened and your abs engaged, lift your left leg up just higher than your top hip. Then slowly lower it back to your bottom leg. Keep going for 30 seconds and then switch sides for another 30 seconds — this move will also target the thighs and glutes. Previous Next Start Slideshow WorkoutsBodyweight ExercisesIntermediate Workouts5-Minute WorkoutsAb Exercises