How to calculate your body age<br>Find your resting pulse rate. The heart is one of the body's most important organs, and a well conditioned and healthy heart is a big part of overall well-being. A normal heart usually beats at between 60-100 times per minute.
Having a resting heart rate of 50 bpm is unsafe.
( z1 safe :polarity - :ARG0 ( z2 have :ARG1 ( z3 rate :mod ( z4 heart ) :ARG1-of ( z5 rest ) :mod ( z6 speed-quantity :quant 50 :unit ( z7 bpm ) ) ) ) )