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.

Exercising a specific muscle group increases blood flow and fat breakdown in that area, but it does not lead to greater fat loss from that area unless the body is in a state of overall calorie deficit.

Doing targeted exercises like sit-ups does not lead to more fat loss in the abdomen than doing full-body workouts, because fat loss across the body is controlled by overall energy balance, not by which muscles are being worked.

If a fit guy burns more carbs during a tough workout, he's likely to burn more fat afterward while recovering.

People who regularly do endurance exercise, like running or cycling, show increased fat breakdown in abdominal fat tissue during exercise, even when levels of key hormones in the blood do not change. This suggests the fat tissue itself adapts to exercise rather than relying on hormonal signals.

If untrained guys eat a high-fat diet for 7 weeks, their bodies get better at burning fat from the blood during exercise compared to eating a high-carb diet.