We hear a lot about metabolism and often blame our “slow metabolism” for our inability to keep our weight under control. But what is metabolism, exactly? And is there anything we can do to change our metabolic rate?
Metabolism basically refers to all the chemical processes that take place in the body in order to sustain life – allowing you to breathe, pump blood, keep your brain functioning and extract energy from your food.
When you hear the term metabolic rate more accurately called basal (or resting ) metabolic rate that refers to the number of calories your body at rest uses each day, just to keep all your vital organs functioning.
You burn additional calories through your daily activities and formal exercise, but by far, the majority of the calories that you burn each day are your basal calories.
The number of calories that you burn every day is directly related to your body composition. Think of your body as divided into two compartments. In one compartment is all the body fat; in the other compartment is everything that isn’t fat (e.g., bone, fluid, tissue, muscle)–that’s the fat-free compartment. The size of your fat-free compartment determines your metabolic rate, with every pound of fat-free mass burning about 14 calories per day. Read the rest of this entry