How do issues with energy balance and body weight regulation lead to obesity?

What do you consider physical fitness to be? What are the components of physical fitness? What changes occur in the body in response to physical training?
June 20, 2018
How important is proper hydration? For what reasons? What is the impact of water balance on health?
June 20, 2018

How do issues with energy balance and body weight regulation lead to obesity?

How do issues with energy balance and body weight regulation lead to obesity? What are the physical and psychological issues that influence energy balance? Is this related to a genetic or environmental cause, or both?