Exercise has many effects on the metabolism, including changing the fuel being used and altering metabolic pathways to make exercise easier on the next occasion.
The constant availability of high sugar, high fat food is just one of the factors driving the obesity crisis: we delve deeper.
Unless they are really trying, most people maintain a fairly stable weight, gaining or losing weight very gradually. How does the body regulate our weight?
A complex system of hormones is constantly adjusting how much fat and glucose is being stored or used by the body according to whether we have eaten or are fasting.
Our bodies are able to use our fat stores to supply energy during fasting. This article explains how it works.
Our bodies are able to make the most of the food we eat by storing any excess calories in the form of fat which we can call on during fasting. This article explains how it works.
As we lose weight, our metabolism slows slightly, it takes less energy to run our bodies and food becomes more appetising. Learn how weight loss affects our metabolism.