We are studying Target Pulse Rate in Algebra 1, I was wondering why you subtract your age from 220? Where does the 220 come from? thank you!
The number 220 comes into play in the formula for maximum heart rate: 220 – Your Age = Predicted Maximum Heart Rate.
The number comes from research regarding maximum heart rate and age. As we grow older, we can’t push our hearts as much as we could as children. The maximum observed heart rate is in the 220 beats per minute range, and with each added year, it drops by a beat or so.
These numbers are approximations. A very fit sixty-year-old would likely have a greater maximum heart rate than an out-of-shape forty year old.
The number 220 comes into play in the formula for maximum heart rate: 220 – Your Age = Predicted Maximum Heart Rate.
The number comes from research regarding maximum heart rate and age. As we grow older, we can’t push our hearts as much as we could as children. The maximum observed heart rate is in the 220 beats per minute range, and with each added year, it drops by a beat or so.
These numbers are approximations. A very fit sixty-year-old would likely have a greater maximum heart rate than an out-of-shape forty year old.
References :
http://www.nemahealth.org/programs/healthcare/heart_rate_pulse.htm
http://www.cchs.net/health/health-info/docs/0900/0984.asp?index=5508