tamiii wrote:
I'm trying to make sense of the following "disrecpancy" in my Lactate Threshold Heart Rate (LTHR) in cycling and what I observed in racing: I did the long FTP test on zwift.
Results:
Average HR for the 20' all out effort = 170bpm
Minus 5% to get an appromixation of LTHR = 161bpm
So my understanding is that "theoritically", I should be able to hold on average 161bpm on an all out 1h effort.
I rested for a few days and raced on zwift and ended up averaging 163bpm for 1h17 racing time.
Two things I can think of:
1. Shall I assume that I should/could have pushed harder/better/stronger on the FTP test to raise my heart rate higher on the 20min all out effort?
2. Taking 5% off of the average HR for the 20' all out effort is not an accurate estimation? The other field test I can think of is the 30' all out solo effort and take the avg of the last 20'. I feel this would give a better estimate but does require another field test on top of the 20' all out FTP test.
Cardiac drift (increasing HR for the same power output) occurs during longer indoor sessions due to dehydration. Dehydration causes reduced stroke volume (volume of blood per beat of the heart).
Thus, LTHR increases as dehydration increases.
Dr. Alex Harrison | Founder & CEO | Sport Physiology & Performance PhD
-------------------------------------------------------------------------------------------------------------------------------------------------
📱 Check out our app → Saturday: Pro Fuel & Hydration, a performance nutrition coach in your pocket.
Join us on YouTube → Saturday Morning | Ride & Run Faster and our growing Saturday User Hub
Last edited by:
DrAlexHarrison: Nov 15, 20 18:34