Sounds good Lina. I guess I was wondering how to implement the running sprints into the elliptical or bike? I think it said in the e-book to run like 4 - 50 meter sprints or something like that. So I was hoping maybe someone had extrapolated the distance on a treadmill to an amount of "time" the sprint on the elliptical or bike should be to gain the same amount of being out of breath you are from a running sprint. Make sense? Am I just thinking too much and over-analyzing?