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 2 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Up-Down Plank Begin in a full plank. Lower your right elbow to the mat and then your left, coming into an elbow plank. Put your right hand on the mat and straighten your right elbow. Do the same on the left to return to a full plank. Continue alternating sides for a full minute — this move will also target the upper body. Previous Next Start Slideshow WorkoutsBodyweight ExercisesIntermediate Workouts5-Minute WorkoutsAb Exercises