Resting Heart Rate — A Signal for Recover From Stress

Four bands. One direction.

What matters most is the direction over time under the same conditions — is the number trending toward the Fit band, or drifting away from it? Your Radar scores every marker 0–100 on the same four-band continuum you see on your report: Fit (90+), Well (50–89), Short of well (26–49), Sick (25 and under). A score of 25 is the Sick line at any age — for some markers that line is a diagnostic criterion, for others a published risk threshold or a coaching reference; the calculator below says which it is here. The values below are the age-40 reference — the bands shift with your age and sex, so use the calculator underneath for your own numbers.

Fit

38 – 58 bpm (M) · 41 – 61 (W)

An efficient heart: strong stroke volume, parasympathetic dominance at rest, a well-developed aerobic base. This is the one marker whose Fit band is a range rather than a ceiling — below it the score eases back down, because a very low rate can reflect deep conditioning or it can reflect conduction, and a number alone cannot tell you which.

Well

58 – 76 bpm (M) · 61 – 79 (W) — and below 38 (M) · 41 (W)

A normal cardiovascular baseline with room to grow: moderate aerobic conditioning, or a system carrying some load. Rates under the Fit band land here too — not a penalty, just the point where a lower number stops being evidence of more fitness.

Short of well

76 – 90 bpm (M) · 79 – 90 (W)

The Radar scores 25 at 90 bpm. Tracks with deconditioning, chronic stress, poor sleep, or illness brewing.

Sick

≥ 90 bpm

Sustained tachycardia at rest. Worth investigating medically as well as through training and sleep.

Unitbpm

Test typeMeasured upon waking, still in bed, before caffeine

Look atyour own trailing 7-day average against your own baseline

The clearest recovery readout you own.

A healthy heart beats less often at rest because it moves more blood per beat. As you build aerobic capacity, stroke volume rises — so the same output arrives in fewer beats. Your resting rate falls as a consequence, not a goal.

Day to day, resting heart rate is noisy. One bad sleep, one hard session, dehydration, alcohol, coffee — any of these can push it up 5–10 bpm and that is normal. The signal is not the one-day reading. The signal is the trailing average against your own baseline.

A gradual creep upward of 3–5 bpm over a week, held across mornings, is one of the earliest markers of accumulated load — poor sleep, illness brewing, overreach, or chronic stress. The body is telling you it isn't resetting.

This lives in Recover From Stress because the resting heart rate is the autonomic system whispering. It is cheap to measure, available to anyone, and more honest than most wearables' sleep score.

On the floor If RHR rises and stays 5+ bpm above your normal for several mornings, treat that week as a recovery week before the next one arrives uninvited. Your system is telling you it is paying down debt, not ready for more load.

Coaches only

The intervention levers live with coaches.

The education above is open to everyone. The specific levers — what to actually do to move this marker — are part of the coaching program. Enter your coach password to unlock, or get in touch about becoming a coach.

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Coaching and education only. Not medical diagnosis or treatment. Excerpts welcome with attribution to metabolicradar.com.

What your heart does when nothing is being asked of it.

Four bands. One direction.

The clearest recovery readout you own.

The intervention levers live with coaches.