I’m surprised. When I read the title of this thread, I expected it to be a question about LOW heart rates on the downhills. I’m not sure why it would be higher, but the only thing I can think to watch out for when cutting loose on the downs is the potential muscle soreness after the fact. Running downhill puts a huge load on the legs because the forces are several times greater than bodyweight, and the muscles are lengthening while absorbing the load. The excess weight and the eccentric loading can take a long time to recover from.
My HR always climbs well above my AeT when trying to descend a technical downhill at what feels comfortable to me. I really have to hold back to keep myself in Zone 2 which feels very slow for a downhill. Is it ok to just cut lose on downhills and disregard my heart rate or will it effect my aerobic base training?
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