EXERCISE / KARVONEN ZONE
Estimate an adult exercise heart-rate zone from age, resting pulse, and explicit low and high reserve-intensity percentages.
Use boundary
Age estimates maximum rate as 220 minus age; resting pulse is removed to create reserve before each intensity is added back.
Target bpm = resting bpm + (220 - age - resting bpm) x intensity.
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What you receive
Use boundary
This is not an exercise clearance or safe limit. Medications, heart conditions, pregnancy, illness, heat, and measured maximum change targets.
Planning and fitness outputs are estimates. Confirm measurements, product specifications, site conditions, health context, and professional requirements before making purchasing, training, medication, or care decisions.
Reviewed reference factors