Frequently Asked Questions
Common questions about heart rate training, zones, calculators, devices, and fat-burning effectiveness — answered with science-based references.
Frequently Asked Questions
How accurate are heart rate calculators?
Formula-based calculators typically estimate HRmax within ±10–15 bpm. They are accurate enough to structure training for recreational athletes but not a substitute for a supervised max test.
What is the Karvonen method?
Karvonen uses heart rate reserve (HRR = HRmax − HRrest). Target HR = HRrest + (Intensity% × HRR). It personalises zones by accounting for resting heart rate.
Should I use different zones for cycling vs running?
Your bpm targets stay the same, but heart rate response differs by sport. Cycling HR is typically 5–10 bpm lower than running at equivalent perceived effort due to the seated position.
Is Zone 2 the best zone for fat loss?
Zone 2 maximises the percentage of calories from fat, but higher intensities burn more total calories per minute. Long-term fat loss is driven by total weekly energy balance.
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