No, but it does leave me feeling absolutely horrible for a couple of hours. Much worse than other tests. My preference is doing max testing instead of a ramp test. The ramp test is designed to test max aerobic power, and my preference is to do an all-out 4-6 minute effort instead of ramp. And similar for FTP/MLSS estimation, I prefer going out and doing an all-out 20 or 30 or 50-70 minute effort.