Beginner: Triceps Push-Back. Stand with feet shoulder-width apart, knees slightly bent, holding a dumbbell in each hand, arms straight down at sides, palms facing back. Lift arms straight back about 2 feet behind you; return to sides. Do 20 reps.
Whether you want to tone and define weak arms so that you can wear something sleeveless with confidence or you want to increase muscle mass, working the .
Your biceps are the strongest of all arm muscles and make a great curve just above the elbow. Make sure to perform bicep curls with three hand positions: palms .