There are two different types of fat in your body – white fat and brown fat. White fat, technically known as adipose tissue, is the more common type of fat. This fat is what our body collects from calories and stores until we need it. Chris Powell says that “When we consume more calories than our body burns, we brilliantly store the excess calories as this amazing ‘blanket of energy’ that covers our body. When we don’t consume enough energy for our needs, our body mobilizes the energy from the blanket and uses it. The average human can store between 90,000 to 140,000 calories of white fat blanketing their body – which is a lot of energy. In fact, that’s enough for nearly 150 hours of running.” White fat also plays a role in telling your body that you are full in addition to resisting insulin. While research is still being conducted on brown fat, there is a lot less of it in your body – a person may have 20 to 40 pounds or more of white fat but only two to four ounces of brown fat. Preliminary observation has shown that this brown fat is very active and burns calories similar to the way muscle building does.