We used to see threads like thus every week or so and i always seemed to win. Back then, in my mid to low 40s, RHR was 28, and i often saw 26-27 when really relaxed. HRmax was 156-158, much lower than standard averages for my age at the time. Now nearly 60, RHR is high 30s to low 40s. No idea HRmax anymore. I was a “good” but not great masters runner.