Have you ever wondered how somebody can eat junk food all day every day and not gain a pound? Or how you can eat healthy a majority of the time but still cannot lose weight or fat? Yeah…me too. I remember being in college and watching my roommate eat Kit-Kats and Oreos and not gain a pound, but when I would eat that I would put on a least a few pounds. The reason behind this is pretty complex and there is a lot of science behind it, but simply put it comes down to ones metabolic rate. Some people just burn more calories than other people. Whether it’s from activity levels, height, weight, or just genetics. Knowing your base metabolic rate is key when it comes to trying to improve your fitness (lose weight, put on muscle, etc).