We work out. We eat. We work out. We eat some more. What is it that we’re eating? How do the things we eat ultimately drive our legs? And how many calories are we really burning? I’m not going to give you specific eating guidelines since everyone has their own dietary needs, and needs to adjust them to their activity and personal requirements. But it’s good to understand what food really is to the body, how it’s used, and how fast it’s used.
Notes on Notation
Before I delve too deeply, I want to clarify something regarding calories. There are two notations for calories:
- c (lower-case “c”): this is the scientific notation for a “calorie”, and is equivalent to 4.184 Joules of energy – the energy needed to increase the temperature of one gram of water by one degree Celsius at a pressure of one atmosphere.
- C (upper-case “C”): known a a food, nutritional, or dietary calorie, this is equivalent to 1,000 calories (lower-case “c”), and is also called a kilocalorie. A calorie is very small amount of energy, so when working with food, it’s easier to use Calories (1,000 calories) instead.
For the purpose of this article, all references to calories will mean food calories (upper-case “C”).