I don't care for sprints unless they happen to be on slight but long descents - high speeds don't excite me on their own at all. If the question primarily relates to the effort, my heart gets quite an exercise every day while commuting to and (especially) from work - it's a 35-40 minute high heart rate ride.
So, the answer is probably "I have no idea" because it is not an event I would remember on its own, as it's not important. I do, sometimes but very rarely, sprint to avoid getting stopped by a red light in one of the suburban intersections with zero traffic.