Training zones by heart rate reserve (Karvonen)
Converts intensity percentage to target HR using HR reserve (maximum−rest), which follows oxygen uptake better than percent maximal HR.
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Check the population, units and version. The result shows the formula or classification; it does not make an automatic treatment decision.
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Method · Limits of application
Karvonen 1957 HR reserve; Tanaka 2001 HRmax 208−0.7age; prescribed intensity
Karvonen zones use resting heart rate and heart-rate reserve; intensity must be prescribed for the individual and exercise context. Without testing, the maximum is a Tanaka 2001 estimate derived in healthy adults, not a measured maximum or a guarantee of safety. The cited ACSM guidance is for apparently healthy adults; application to chronic disease or limitations requires appropriate assessment. Do not automatically extrapolate the equation to children or conditions that alter the heart-rate response.
Conditions of use
Check the population, units, inclusion and exclusion criteria, and version in the original source. A result alone does not establish a diagnosis, discharge decision or prescription.
Documented parameters
- Age · years
- Resting heart rate (on waking) · bpm
- Maximum heart rate measured in a test (if available) · bpm
3/3 reference cases checked. Numerical tests are not clinical validation.
Relationship with cancer research
General context — relationship to be defined
A resource for general clinical contexts. This edition does not assign a specific oncological relationship; selecting it for a study requires a justified question, population and purpose.