If you are metabolically flexible, your body chooses its energy source depending on what’s available from your diet.
If you eat carbs, you burn carbs. If you eat fat, you burn fat.
Metabolic flexibility also means that during exercise you can easily switch fuels depending on the situation.
If you need a burst of energy to run away from a charging rhinoceros, blood sugar is your best choice. For most of day-to-day life, it’s your slow-burning fat stores.
Bottom line, there is a right time to use fat, and a right time to use sugar. And that’s what metabolic flexibility gives you.
