Because of the weather for the last 6 months been going for a brisk walk for 45 min's 4 days a week. Figure the weather is going to be changing preventing me from using the outdoors because of mudd. I live in the canyons and the roads are of dirt. So rain = Mudd. Anyways today thought i would use my eliptical and after 45 min's had to check my paulse to see if I was still alive. What a difference.