PopsugarFitnessWorkoutsBodyweight Arm WorkoutBe Warned! Your Arms Will Be So Sore After This 15-Minute Bodyweight Workout December 29, 2019 by Jenny Sugar View On One Page Photo 10 of 10 ADVERTISEMENT () Start Slideshow Share This LinkCopy ← Use Arrow Keys → 10 Elbow Plank With Side Step Start in an elbow plank and alternate stepping your legs to the side, keeping your toes off the floor. To modify, tap your toes to the floor.Complete 10 reps with each leg for a total of 20 reps.PreviousNext Start Slideshow WorkoutsStrength TrainingBodyweight ExercisesBeginner WorkoutsArm Workouts15-Minute WorkoutsArm Exercises