Answer: 
Explanation: The peripheral nervous system (PNS) is the division of the nervous system containing all the nerves that lie outside of the central nervous system (CNS).
She can continue progression in lower body strength by either A) adding weight to her set of squats, or B) adding more repetitions to her set of squats. This will continue to stress her lower body muscle, causing it to grow in response to the increased work load.
Answer:
Exercise and eat well balanced diets
What is your exact question?
A. It weakens it. Stress increases all the bad factors. For example it makes you age faster