Chest Strap vs Optical HR: Which Sensor Is More Honest?
Two ways to read your heartbeat exist. One uses electrical signals, the other uses light. Here is what the science says about which is more accurate, and why it still only gives an indirect calorie guess. Burnie itself does not use heart rate at all.
13 Jul 2026 · Burnie Academy
heart-ratesensorscaloriesscience
You see two kinds of heart-rate gadgets in the gym. One is a strap around your chest. The other is a band on your wrist with a little light. Both show a heart number on your phone. But they work in totally different ways. This article is general science about how the two sensors compare. It is NOT a Burnie feature. Burnie never reads your heart rate. Burnie uses your phone or Android Health Connect (Samsung Health) active calories, or a number you type in yourself.
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