Movement
Movement and training
Heart Rate Reserve Calculator
Separate the reserve calculation from the selected intensity used to produce one planning target. The calculator keeps reserve = maximum - resting; target = resting + reserve x intensity visible so the selected inputs and resulting heart rate reserve can be checked together.
Enter measurements for heart rate reserve
Reading the requested heart rate reserve
Separate the reserve calculation from the selected intensity used to produce one planning target.
Only the labeled heart rate reserve entries contribute to heart rate reserve; omitted circumstances remain outside the arithmetic.
The surrounding record may also call for heart rate zones.
Definitions attached to the heart rate reserve fields
- Measured or selected maximum heart rate: Enter measured or selected maximum heart rate in bpm; the heart rate reserve illustration uses 185 bpm. Digits copied in a different unit change heart rate reserve under Karvonen heart-rate-reserve arithmetic. Under Karvonen heart-rate-reserve arithmetic, the accepted range for measured or selected maximum heart rate runs from 60 through 240.
- Resting heart rate: For this heart rate reserve case, resting heart rate starts at 65 bpm. Record whether it was measured, selected, or copied before using heart rate reserve from reserve = maximum - resting; target = resting + reserve x intensity. Under Karvonen heart-rate-reserve arithmetic, the accepted range for resting heart rate runs from 20 through 160.
- Selected reserve intensity: For heart rate reserve, the worked selected reserve intensity is 60 %. Preserve % and its measurement source because this field supplies a distinct term in Karvonen heart-rate-reserve arithmetic. Under Karvonen heart-rate-reserve arithmetic, the accepted range for selected reserve intensity runs from 0 through 100.
Before calculating heart rate reserve, verify that all values belong to the same person, session, sample, or plan and use compatible units.
How the heart rate reserve result is produced
Under Karvonen heart-rate-reserve arithmetic, the result panel reports heart rate reserve, reserve-method target, resting share of maximum. Match each symbol or operation in reserve = maximum - resting; target = resting + reserve x intensity to the labeled measured or selected maximum heart rate, resting heart rate, selected reserve intensity fields before substituting numbers.
Inspect every denominator in the heart rate reserve equation reserve = maximum - resting; target = resting + reserve x intensity. Under Karvonen heart-rate-reserve arithmetic, a zero or near-zero denominator can make the result undefined, unstable, or misleadingly large.
Default values and their heart rate reserve output
The displayed case begins with Measured or selected maximum heart rate = 185 bpm, Resting heart rate = 65 bpm, Selected reserve intensity = 60 %.
Using those defaults, the calculator reports Heart rate reserve = 120 bpm; Reserve-method target = 137 bpm; Resting share of maximum = 35%. This fixed heart rate reserve case checks reserve = maximum - resting; target = resting + reserve x intensity after code, browser, or formatting changes.
A controlled heart rate reserve comparison changes one value, recalculates heart rate reserve, and records the unrounded difference.
Measured and estimated maxima are not interchangeable
For heart rate reserve, heart-rate reserve subtracts resting heart rate from the maximum value entered. For heart rate reserve, label that maximum as measured or estimated in any saved record.
For heart rate reserve, the selected intensity is then applied to the reserve and resting heart rate is added back. For heart rate reserve, this is why a reserve-method target differs from simply multiplying maximum heart rate by the same percentage.
What the heart rate reserve arithmetic leaves out
For heart rate reserve under Karvonen heart-rate-reserve arithmetic, movement results depend on the stated distance, duration, workload, and body measurements; terrain, technique, equipment, and environmental conditions remain outside simple arithmetic.
Reversing the ratio in reserve = maximum - resting; target = resting + reserve x intensity answers a different heart rate reserve question, so retain its numerator and denominator labels.
Changing one heart rate reserve assumption
For heart rate reserve, first vary measured or selected maximum heart rate within a defensible range while holding the other entries fixed under Karvonen heart-rate-reserve arithmetic. Explain the direction of the new heart rate reserve from reserve = maximum - resting; target = resting + reserve x intensity, rather than judging it only by familiarity.
Repeat the heart rate reserve exercise with selected reserve intensity under reserve = maximum - resting; target = resting + reserve x intensity. If both changes alter the conclusion, report alternative Karvonen heart-rate-reserve arithmetic cases instead of presenting one scenario as exact.
Quality checks before saving heart rate reserve
Check measured or selected maximum heart rate, resting heart rate, selected reserve intensity against their labels in reserve = maximum - resting; target = resting + reserve x intensity. A transposed value can remain numerically valid while describing a different Karvonen heart-rate-reserve arithmetic setup.
For heart rate reserve under Karvonen heart-rate-reserve arithmetic, do not substitute zero for missing data, reuse a rounded intermediate as the original measurement, or combine time boundaries.
Keeping a reproducible heart rate reserve record
When recording heart rate reserve from Karvonen heart-rate-reserve arithmetic, compare movement sessions only after confirming that the timing method, route, recovery interval, and intensity definition were recorded consistently.
Store measured or selected maximum heart rate, resting heart rate, selected reserve intensity, their units and dates, the equation reserve = maximum - resting; target = resting + reserve x intensity, and the unrounded heart rate reserve, reserve-method target, resting share of maximum values. Note heart rate reserve exclusions or selected rates explicitly so another reader can reconstruct the Karvonen heart-rate-reserve arithmetic result.
Common heart rate reserve questions
Which details should be saved with heart rate reserve?
Save measured or selected maximum heart rate, resting heart rate, selected reserve intensity, their units and dates, the method identified as Karvonen heart-rate-reserve arithmetic, and the displayed relationship reserve = maximum - resting; target = resting + reserve x intensity. Those heart rate reserve details reconstruct this exact Karvonen heart-rate-reserve arithmetic calculation.
How much should heart rate reserve be rounded?
Keep the unrounded heart rate reserve from Karvonen heart-rate-reserve arithmetic for dependent arithmetic, then report only source-supported precision. For heart rate reserve, extra decimals after applying reserve = maximum - resting; target = resting + reserve x intensity cannot repair uncertain or estimated inputs.
Why could another heart rate reserve tool disagree?
Another tool may use a different Karvonen heart-rate-reserve arithmetic convention, unit, date boundary, reference population, or rounding rule. Compare the heart rate reserve equations and field definitions under Karvonen heart-rate-reserve arithmetic before deciding that either result is erroneous.