Get strong, lean, lovable arms...they're great for hugging and carrying your significant other! Want to bulk up? Pick a heavier weight and do fewer reps/set. Prefer to tone muscle? Choose a lighter weight and do more reps/set. In general, the trainer's rule of thumb is to pick a weight that makes it hard to complete your last 2-3 reps/set. Pace yourself and repeat regularly for those most lovable arms.