How is the target heart rate zone related to the MHR?

For moderate-intensity physical activity, a person's target heart rate should be 50 to 70% of his or her maximum heart rate. ... For example, for a 50-year-old person, the estimated maximum age-related heart rate would be calculated as 220 – 50 years = 170 beats per minute (bpm).

Brainlest would be appreciated, have a great day.

just put in mind that others aren't perfect. we all have problems that we feel makes us low of the low. but know that you are special and unique, that is what makes you out of this world : ). you might think and feel that others judge you, but mostly other people are scared if people judge them. just be happy, spend time with family, smile because that is the greatest medicine. a happy life. hope this : ))

it contracts and pulls the lungs downwards. this opens the lungs and chest cavity and allows air to come into the lungs.