Are you trying to lose weight, build muscle, get stronger or excel in a given sport? Maybe you're just hoping to slow the aging process, which exercise and good health habits can surely help accomplish. But male or female, young or old -- where do you start and what do you do? And if you're already an experienced exerciser or athlete, how do you fight your way off a plateau or avoid going stale?

Start by asking Marty Gallagher! He's live online with Health, Strength and Fitness on Tuesdays at noon ET.

Over the past 20 years, Marty Gallagher has written more than 200 articles for such magazines as "Muscle and Fitness," "Flex" and "Powerlifting USA." He has interviewed hundreds of the world's top athletes, quizzing them on the training tactics they used to succeed.