I ignored resting heart rate until a week I thought I was “pushing through.” I was getting a cold. The number was 12 beats higher than my usual 52, sitting there like a polite warning I had muted.
You can take it with two fingers on your neck, sixty seconds, before you stand up. A watch is easier if you already wear one. The device brand is not the point. The trend is.
Epidemiology has tied higher resting heart rate to higher mortality in lots of cohorts, independent of some of the usual suspects. That does not mean your 72 is a death sentence. It means a rising baseline is information. Fox’s old work and later meta-analyses are the boring backbone here, not a biohacking influencer.
What a jump usually means
Alcohol the night before. A bad sleep. A coming virus. Too much volume in the gym. Heat. Dehydration. Sometimes just a loud street.
One high morning is noise. Three high mornings and a gym ego is how you turn a niggle into a month off. I use a simple rule: if RHR is 7 or more above my rolling average, I do not do the hard session. I walk or I lift light or I sit with the shame.
What “good” looks like
Athletes can live in the 40s. Plenty of healthy men sit in the 50s and low 60s. High 70s at rest, if that is your baseline and you are not on a beta blocker, is a conversation with a doctor, not with a pre-workout.
I care more about the slope over months than about bragging. Zone 2 work and sleep usually drag it down. Getting leaner sometimes does too. A new baby drags it up and that is not a character flaw.
If you like HRV, fine. It is noisier and people use it to justify whatever they already wanted to do. RHR is harder to argue with at 6:30am, half-awake, staring at a number that does not care about your program.
I keep a rolling 7-day average in a notes app. Not a dashboard. When the average creeps from 52 to 58 and stays there, something in the week is wrong. Usually alcohol or a block of poor sleep. Occasionally a training week I was proud of and should not have been.
When to stop playing coach
Chest pain, fainting, a sudden resting rate that is new and high, palpitations that last. You leave the notebook and you go in. Beta blockers and some other drugs cap or alter the number; do not interpret those like a clean athlete.
Common questions
Wrist watch vs chest strap at rest? At rest, either is usually enough for a trend. Chest straps still win for intervals.
Should I stand up first? No. Lying or sitting, same way each morning.
Coffee before the reading? No. That is how you measure caffeine.
AFib? Do not diagnose it from a blog. If a device flags irregular rhythm, follow the device’s medical pathway.
Sources
- Fox K, et al. Resting heart rate in cardiovascular disease. J Am Coll Cardiol. 2007 (and related reviews).
- Zhang D, Shen X, Qi X. Resting heart rate and all-cause and cardiovascular mortality. CMAJ / meta-analysis literature.
- AHA public materials on resting heart rate ranges and when to seek care.
- Polar / clinical practice of morning RHR as a training readiness heuristic (coach-level, not a trial endpoint).
Science edit: Lena Park.
