Hi all! I have just finished a 25 minute seated stair stepper workout. I plugged in my weight when I started the workout. At the end it told me I had burned 170 calories. MFP and another calorie calculator told me I burned 600 plus for the same routine. Which should I believe? I find it hard to believe I burned 600 but two sources are telling me that. I weigh 305, 5’3”, 46, female. Thanks!