Push in again. This has implications at many levels of many exercise programs. It has ramifications for particular populations and their attitudes, values, beliefs and fears about particular forms of exercising, and these are very understandable given the array of paradoxical social messages we are bombarded with. Energy In, Energy Out. Yep, you've heard and read about it.
Body fat is a store of excess energy, a result of a relative energy surplus over time.
In short these need to equate to an energy deficit. With this, after the first few days when water and carbohydrate stores are lowered, the body begins to 'tap' into the reserve stores of fat. Concurrent behavioural and physiological changes make this more difficult over time. We will focus on the energy expenditure side of the equation for you. I will return to this.