Blast Fat with Exercise Machines

Stationary Bike

The Mood Lifter

Burn rate: 14 calories per minute

The benefit: Researchers at the University of Northern Arizona found that cycling on a stationary bike for as little as 10 minutes reduced fatigue and negative moods, while improving energy levels. The stationary bike is also the perfect vehicle to prevent chunky guys from hurting themselves as they lose the chunks. That's because cycling is not a load-bearing exercise, says Kate Heelan, Ph.D., an exercise researcher at the University of Nebraska at Kearney.

Do it right: Many cyclists develop lower-back pain because of their semifetal posture. "Stand up every 5 minutes and pedal as if you were climbing a hill for 60 seconds," says Robert Morea, C.S.C.S., a trainer in New York City. "It'll take the pressure off your lower back, force you to use different muscles and break up the monotony of your workout."

The 20-minute fat-burner: Try this workout from Carmichael. It varies your sprints to challenge your cardiovascular system and muscles in different ways. Following your warmup, start cycling at an intensity that's about 95 percent of your full effort for 90 seconds, followed by a 90-second recovery interval at about 40 percent of your full effort. Then, using the same intensities, perform 60-second and 30-second intervals. After the final 30-second recovery period, cycle at 70 percent of your full effort for 4 minutes, then repeat the entire set of intervals.