Popsugar Health & Fitness 15-Minute Workouts Bodyweight Arm Workout Be Warned! Your Arms Will Be So Sore After This 15-Minute Bodyweight Workout 29 December 2019 by Jenny Sugar View On One Page Photo 3 of 9 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 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. This counts as one rep. Perform five per side for a total of 10 reps. Rest your knees on the floor if you need to. Previous Next Start Slideshow 15-Minute WorkoutsBodyweight ExercisesArm WorkoutsBeginner WorkoutsArm ExercisesStrength TrainingWorkouts