By Jessica Brown
What's the secret to weight-loss success? It's not logging long gym hours. When it comes to working off stubborn bulges, less can be more, says Harley Pasternak, creator of the 5-Factor fitness and diet plans and trainer to celebs such as Jennifer Hudson, Lady Gaga, and Amanda Seyfried. His signature get-lean routine -- alternating simple strength moves and bursts of intense cardio with no rest periods -- tones you from head to toe in just 25 minutes. And because this interval-style formula is more intense than a steady-pace workout, you'll melt more fat in less time. Do the following routine five times a week and you'll see results in just a month!