Interval Training Burns More Calories in Less Time

http://www.webmd.com/fitness-exercise/news/20121012/interval-training-burns-more-calories-less-time

“In the new study, exercise physiology graduate student Kyle Sevits of Colorado State University and his team demonstrated that a mere 2.5 minutes of giving it your all on an exercise bike can burn up to 220 calories.”

So go for short bursts of excessive. Perfect to do during commercials.