Popsugar Health & Fitness 15-Minute Workouts Quick Home Workout Think You Can't Get in a Good Workout in 15 Minutes? This Workout Will Prove You Wrong 1 December 2018 by Jenny Sugar View On One Page Photo 13 of 15 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 13 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. This counts as one rep. Do as many reps as you can for 45 seconds. Rest for 15 seconds. Previous Next Start Slideshow 15-Minute WorkoutsBodyweight ExercisesIntermediate WorkoutsCardio WorkoutsWorkouts