Don't count on treadmills when counting calories
I've yet to learn of or use a treadmill that's intelligent enough to give an accurate calorie burn count -- no matter what the manufacterer claims. Even if your treadmill allowed you to enter your weight, age, and other factors that affect the amount of calories you burn, the precentages, according to numerous sources, are always inaccuarte. Sometimes there is a 50 percent difference (the machine claims you burned 300, but in reality, you've only burned 150 calories). If you are trying to lose weight, the higher estimate will throw you off. Considering this, whenever I run on the treadmill, I divide the end result of burned calories in half. If the treadmill's computer reports that I burned 600 calories in one hour, I feel safe in assuming I burned at least 300 calories an hour. Since people tend to under-estimate the amount of calories they consume in a day, I figure it's safe to also under-estimate the amount of calories that you burn during a work-out. The way your clothes feel is a better indicator than any computer.