1. Resting Metabolism Rate - which accounts for 60-75% of all calorieburning processes is the amount of energy required to keep homeostatic processes (the regulation of organ systems and body temperature) performing efficiently.

2. Thermic Effect of Physical Activity - accounts for 15-30% of daily calorie burn depending on an individual's activity level, which includes structured exercise as well as non-structured activity such as shivering and fidgeting. Most recently, this non-structured movement has been coined the name NEAT, for non-exercise activity thermogenesis (Levine et al., 2005).

3. Thermic Effect of Feeding - Energy required for the digestion, absorption, transport, metabolism and storage of consumed food. It accounts for approximately 10% of daily calorie burn.