So I just completed today's prescribed VO2 / L5 intervals. 5X5 at 113-115% of FTP. Promisingly, perceived exertion was down in relation to the level of power, though there still was that odd "I want to puke" feeling near the end of the last two.
My question is this: Should my heart rate max out as the interval gets longer? I remember reading other descriptions of these intervals, and people talk about a slow but steady rise in heart rate to about near max. What I usually see is a slow rise during the first 3 minutes, then in the last two minutes, things will settle in at 179-181. My max heart rate is 190.
So do other people generally see a steady heart rate near the end of L5 intervals, or is closer to max generally expected?
Since I'm playing with power, the question might be moot. But, I still have an interest with how the body responds to exercise in terms of heart rate.