Personal trainers can be invaluable if you're a rank beginner, have hit the doldrums, or worry that you can't stay motivated on your own. Depending on where you D3 Power Leveling live and how long the trainer has been in business, the cost can be as little as $25 an hour or as much as $300. Sometimes one or two sessions are all you need to get on track. When deciding on a trainer, look for certification by organizations like the International Sports Sciences Association, the National Endurance & Sports Trainers Association, the American Council D3 PowerLeveling on Exercise, American College of Sports Medicine, the American Fitness Training of Athletics, or the Aerobics and Fitness Association of America. Ask the trainer about his or her background. "Is this an actor or someone with other aspirations? If so, move on," says Jillian. "Get references and call them. A trial session can tell you whether your individual needs and goals will be addressed or if you'll just be thrown into a one-size-fits-all routine. Finally, you have to ask yourself, Is this someone I like? Someone who'll Diablo 3 Power Leveling inspire me? Someone I'll want to see at 6 in the morning? If you're thinking of joining a gym because it provides personal trainers, "ask for a free week of private training before you sign the contract," says Bob. And make sure that gym trainers, too, have the proper credentials.