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🏃 Karvonen Target Heart Rate (HRR)

UseWhen to use: cardiac rehab / exercise prescription with known HRmax and HRrest.

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StrataOutputs a target beat range for the selected intensity band.

LimitsWhen not to use: beta-blockers / chronotropic incompetence without ad… · Pitfall: predicted HRmax scatter. · Prefer measured HRmax.

SourceKarvonen heart-rate reserve method

Runs locally in your browser (no PHI uploaded). For licensed clinicians — not a substitute for clinical judgement.
Stored on this device for revisit reminders

This-shift next steps

After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.

Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.

Methodology · worked example, guidelines & full notes
Clinical takeaway

HRR method.

When to use

When to use: cardiac rehab / exercise prescription with known HRmax and HRrest.

How it works

Target = ((HRmax − HRrest) × intensity) + HRrest.

Key points

  • HRR method.
  • % intensity band.
  • Next: supervised progression.

References

  • Karvonen heart-rate reserve method

Worked calculation

The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.

Resting HR60 /min
HRmax (measured or predicted)180 /min
Lower intensity0.50 fraction or %
Upper intensity0.85 fraction or %

→Target HR zone120–162/min

  • HRR：120 /min
  • Intensity：50–85% HRR
Verification & sources · governance
FAQ

Frequently asked questions

Does Karvonen Target Heart Rate (HRR) upload patient data? Where is it calculated?
Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
How is Karvonen Target Heart Rate (HRR) calculated in practice? Can you show a worked example?
Inputs: Resting HR 60 /min, HRmax (measured or predicted) 180 /min, Lower intensity 0.50 fraction or %, Upper intensity 0.85 fraction or % → Result: Target HR zone 120–162 /min（HRR: 120 /min, Intensity: 50–85% HRR）
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