You're hitting the gym four to five times a week. You're dutifully doing the elliptical trainer or treadmill for an hour at a time. But all those long, boring workouts do nothing to strengthen your heart or slim your waistline. Do enough cardio and aerobics and you'll get old before your time.

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In his new book, P.A.C.E.: The 12-Minute Fitness Revolution (Wellness Research & Consulting, Inc., January 2010, $24.95, 978-0-9794703-9-4), Al Sears, MD, shows why the exercise rules you've followed for years are precisely the ones you need to ignore. Here's why: Your lungs shrink with age, and each time you practice extended, endurance-related cardio, you're making them even smaller and weaker (www.pacerevolution.com).

"These misguided forms of exercise downsize your heart's output, shrink your lungpower, and encourage your body to make more fat," says Dr. Sears. "My book will show you how to replace the flawed and ineffective theories that have been mistakenly accepted without proof of what really works."

With extensive work rehabilitating overweight and diabetic patients, Dr. Sears has designed a fitness program - PACE, which stands for "Progressively Accelerating Cardiopulmonary Exertion" - that lets you burn fat and strengthen your heart and lungs... no matter how out-of-shape you may be when you start.

"One of my patients could only walk for 45 seconds at a time when she first started PACE," says Dr. Sears. "That's the most exercise her body could handle. But after following the PACE principles, she dropped 45 pounds in the first four months. And her cholesterol and other risk factors improved dramatically."

Dr. Sears shows you why 12 minutes of activity a day is all you need to reclaim maximum health. After following PACE, scores of Dr. Sears' patients have overcome their health concerns, thrown away their prescription drugs, and lost substantial amounts of fat. Now, he is sharing his successful program nationwide.

Inside P.A.C.E.: The 12-Minute Fitness Revolution, you'll discover: -- How to turn on your "native fat burner" -- How you can throw away your jogging shoes and avoid those long, boring workouts -- Why conventional aerobics won't protect you from heart attacks or heart disease -- How you can slim down by eating the foods you love -- How to pump up your immune system, making you virtually disease-proof

To discover the keys to a happy, healthy body, visit the website at www.pacerevolution.com.