D.
This is because if you’re in high air polluted areas your lungs could be affected.
If you exercise in heat you’re more likely to have a heat stroke or pass out, which are both dangerous.
If equipment is made for something specific, using it wrong could result in physical injury.
The answer to this question is life expectancy.
<span>Your target heart rate h</span>as a range of two numbers.
workout, eat healthy, do jumping jacks, do push ups
