Answer:
Subtract your heart's resting rate from your maximum rate. For example, if you are 40 years old, subtract that number from 220; your maximum rate is 180. Next, subtract your resting rate or 80 in this example. Your heart-rate reserve is 100 beats per minute.
I hope so! Having friends and being able to socialize with them is a very important part of mental health.
Answer:
Air, water, land, climate etc are included in natural physical aspects.