New Jillian Michaels 30 Day Shred Video

Depends on who you are !! You will burn MORE calories the less fit you are, and the heavier you are(especially with muscle mass because muscle burns more calories than fat.) You also have to factor in your age and stuff like that. The only way to know with reasonable accuracy how YOU burn calories is to get a heart rate monitor that is customized to you and your fitness level that calculates them for you !!

For a 20 minute circuit training session with lotsa cardio I burn around 150. Contestants on the Biggest Loser can burn 2x that for the same amount of time (look at the bigger people as larger ovens with more wood burning in there !!!!)