Nearly 20 percent of women now strength train twice a week, slightly more than the 17.5 percent who pumped iron in 2004, according to research from the U.S. Centers for Disease Control and Prevention. That's great, but it also means that 80 percent of you still aren't lifting regularly. To give you a nudge--okay, a firm push--toward the dumbbells, here are three mini mantras (below) that will help persuade you to add weights to your routine today. Take a look at them whenever you need incentive to head to the gym.
1. I'll stare off osteoporosis. Resistance training increases bone density, which can prevent age-related loss.
2. I'll keep my metabolism revved. Muscle trumps fat for calorie burning-add more, burn more.
3. I'll look slimmer. Pound for pound, muscle takes up less space than fat. Boost muscle and I'll appear thinner.