Go to the gym or join waight watchers
There is no known way to prevent Anorexia nervosa, so it CANNOT be prevented, but it CAN be treated by psychological therapy and weight gain, so that statement in your question is FALSE.
That's your answer! ^^
Airflow
The purpose of poking holes in the plastic bag is to allow airflow to occur in the bag. The purpose of the air is to keep the vegetable or fruit fresh longer.
Hope This Helped! Good Luck!
Isostatic stretching is a flexibility training which is in an advanced form. It should be performed with caution. It is important to avoid isostatic stretches because they can disrupt muscle growth and it fatigue the muscles. It is recommended to do some warm up before doing these stretches.