The principle of progression states which of the following? as you increase your overload, your muscles will adapt to the changes
increased demands are placed on the body
you use specific exercises to work different areas of the body

The Progression Principle states that there is a perfect level of overload in-between a too slow increase and a too rapid increase.

to keep it profesional sex is the main way humans reproduce

explanation:

take a nice, long walk. walk, feel the wind through your hair and your it is very relaxing.