Originally Posted by
smashndash
Very fit runners will find it difficult to max out their HR on the bike. It’s not as demanding. Your max HR is very personal and is best determined by running on an incline treadmill.
that is me mostly, long history of running 30-35 mpw. Up to 55 mpw maximum.
Never been what I'd call particularly fast but I'd generally beat 80-90 percent of the people in races I ran
On a bike my legs run out of muscle way before I run out of cardio. Hr maxes around 160 on the bike. I always look at zwift race results and wonder what people think about my 130 bpm average over a race which is almost always way lower than others