Brevity is the soul of wit, eh?
So, my resting hear rate is low.Partly genetics - my dad used to train hard and his RHR is in the high 30', partly training I guess. My training heart rates also seem quite low. As a 47 year old fit male, my long runs hover around 120 BPM, maybe drifting up to 127 after an hour or so.
My watch estimated my Max HR at 178. I had never seen it above 160 until my first 5k race. I went out too hard, almost bonked at the 4k mark, THEN had a short but steep hill to do with about 300m to go; essentially it was the hardest I've worked in my life. My hear rate maxed out at 160.
I got the HRM pro and turned on autodetection for LTHR. Nothing after a variety of easy, hard, and anaerobic runs. A month goes by and still nothing. So I lowered the max heart rate to 174 as I learned that could be the problem. Nothing.
So I finally decided to do the Guided test. It did detect a LT and set it at 4:48 min/km and 160 bpm!
Anyway, I looked at my upcoming Daily Suggestions and they changed. They got longer and harded. Much harder. My next quality run is a 1:07 temp run with 47 minutes at 5:00min/km. I know for many of you that may be easy, but for me, I have never run 5min/km for anything more than 4 intervals of 5 minutes!
Anyway, I'm wondering if the LTHR is wrong, the max HR is wrong, or if I just need to be running a lot hard. Before using daily suggestions two weeks ago, I was using Pete Magill's Fast 5k and loved it.
TL;DR My watch set my LTHR and it seems way too high for me to sustain.