Triceps extension with toning tube exercise is a simple but effective workout to strengthen and tone your arms, triceps and upper body muscles. Toning tubes or resistance bands provide a unique resistance throughout the workout. This seated triceps extension workout targets upper back muscles and shoulders via using toning tube. It strengthens and makes flexible your triceps, biceps, chest, back and shoulder muscles. Sitting on a stability ball increases the intensity and challenge of the workout along with the additional benefits. Stability ball involves your core muscles in the workout as you have to concentrate on abs in order to maintain your balance and stability.