You can estimate your maximum heart rate with the equation:
205.8 – 0.685 (age)
Someone who is 40 years old would have an estimated maximum heart rate of 178 beats per minute (bpm) using this equation.
This calculation provides an estimate of your maximum heart rate and may vary by up to 6 beats per minute. Therefore, the maximum heart rate for a 40-year old may actually be anywhere between 172 – 184 bpm.
Source: Edwards, S., & Brown, L. (2003). Fit and Fat; The 8-Week Heart Zones Program.
Heart rate charts that you see at a gym or studio use the equation: 220 – age = estimated maximum heart rate. The estimated margin of error with this equation is up to 12 beats per minute.
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