Debbie Rocker leads you in this 20-minute walking upper-body workout. The focus of this low-impact walking workout is on the upper body, but you’ll be working the whole body. Start with a short upper-body warm up and then alternate between calorie-burning cardio routines that engage the chest, arms and back muscles, and sculpting routines, using the resistance band, to define and strengthen your shoulders, biceps and triceps.