Even though your body burns more fat when you exercise before eating, the amount of fat in your blood doesn’t go up — so the extra fat burning must be happening inside your muscles, not because more...

Whether you exercise before or after eating, the amount of fat floating in your blood doesn’t change much during the workout — so the extra fat burning when fasting must be happening inside the muscles, not from more fat being released.

Whether you're fit or out of shape, male or female, young or older, working out before breakfast still burns more fat than after eating — as long as you're not sprinting at max effort.

Working out before eating breakfast burns about 3 grams more fat than working out after eating, because your body has to use stored fat for energy when you haven’t eaten.

Exercising a specific body area increases fat breakdown in that area, but this does not lead to noticeable fat loss there because the released fatty acids are often taken up by nearby muscles or tissues instead of being burned for energy system-wide.

In people who are obese and inactive, a single exercise session does not lead to higher fat burning over the next 24 hours, even when they start with higher fat oxidation at rest, suggesting their bodies do not adjust fat metabolism effectively during physical activity.