To keep from losing gains in fitness, it is necessary to maintain intensity levels. True.
Answer:
Physical, mental, social, and mental health are interrelated with one another.
The answer can be both increase in self-esteem and increase in aggression. All of the research generally points to increase of self esteem because during puberty self awareness is very prominant which increases self esteem. I would be safe and go with self esteem. I hope this helps.
Heart pumping mechanism about blood are statements true