Quick fact. Ready? Every single one of our cells contains mitochondria. They are so important, for they produce 97% of the body's total energy! They are especially concentrated in high energy demanding tissues like the heart, liver, and brain, where there can be up to thousands of mitochondria per cell! Is the human body not the most amazing thing?

Quick fact. Ready? One pound of lean body mass effectively burns 50 calories per day at rest. That's only if you have been stationary for an entire day. Imagine how much more muscle burns when they are activated through exercise and activities of daily living.

Quick fact. Ready? The 'burn' that you feel during an intense workout is the build up of lactic acid in your muscles. That exact same lactic acid is actually the preferred energy source to be used by your heart. Lactic acid may be uncomfortable, but is certainly not the bad guy!

Quick fact. Ready? Working at different intensities of exercise determines whether one is burning more carbohydrates or fats as fuel. Higher intensities use mainly carbs, while lower and more prolonged intensity training makes use of fats.

Quick fact. Ready? The intensity of a specific activity can often be conveyed through way of METS (Metabolic Equivalents). These are expressed in relation to one's Basil Metabolic Rate, which is why Exercise machines ask to input one's weight prior to exercise.

Kenji Miyazawa