How can exercise hepls us get better sleep, Improves our mermory, boost our immune system and Increases Energy?

Thesis: To advise my people of spectators about how exercise controls weight, battles wellbeing conditions and illnesses, and improves disposition.

My topic is Health Benefit of Exercising. My paper has to be 8 pages long. my essay is about how to Boost our immune system, Helps with better sleep, Improves Memory and Increases Energy.