It's quite possible that differences occur at the beginning of the run, but what I'm saying is that you have to do the entire bike first, and then the entire run to ascertain that there is in fact a difference. I'm not sure what studies were cited, but in order to know if you are improving the first part of a run, don't you have to do the second part too?? In other words, if you only test 5 or 10 minutes, even if it is faster, don't you have to test the last 30 or 40 minutes to see if you gave it back for some reason???? Like I said, it is a lot more complicated that it appears at first glance, and I just don't think you get anything meaningful from a 40 minute ride(at some unknown pace), going into a 5 to 10 minute run(also at some unknown pace)....