14 Sep 2007
If "spot-reducing" really worked, then, everyone who chewed gum would have a skinny face!
The fact is, stomach and thigh exercises (and their related machines) are not aerobic of fat-burning exercises. That's because they fail to meet one essential requirement. The activities don't last more than three minutes in continuous duration. Therefore, the exercise remains anaerobic. The burning sensation is not fat being burned or "melting away." Instead, it's the muscles storage of lactic acid as glycogen (not fat) that has been used for energy during anaerobic metabolism.