I've been given a treadmill that is NOT new. It's manual and the keeping track thing doesn't work. WARNING I'M SEDENTARY AND THE FOLLOWING PROVES IT. I sweat after about 7 minutes and can go 20 with effort. Fitday says that's about 95 calories. It feels alot harder than that. Anybody have a good guess?

no idea, but you can pick up a basic heart monitor for about $60 at a sporting goods store. i have a polar hr monitor, and it's great. it'll calculate calories, beep to let you know you are slacking, and lets you customize your training goals. mine was about $100, i think.

i got it when i realized that the only reason i went to the gym was for the heart rate monitor machines, so having it let me cancel a gym membership in favor of exercise outdoors.

another benefit i discovered is that certain machines will sync with my monitor, so i don't have to constantly grip the monitor things when i use a cardio machine.