Doing really intense endurance workouts might raise your blood sugar levels and make it look like you have diabetes, even if your body is actually super healthy.

Doing light, steady exercise like walking or slow cycling doesn’t seem to change blood sugar levels much in healthy adults who don’t usually exercise.

Some endurance athletes can have blood sugar levels that look like they're prediabetic or diabetic, even though they're actually healthy, because their bodies use up glucose so fast during training.

Lifting heavy weights helps lower your blood sugar quickly by moving more glucose into your muscles, and over time this can improve your blood sugar control and cholesterol.

Doing light, steady exercise like walking or slow cycling can slightly improve heart health in inactive adults — lowering blood pressure and bad cholesterol while raising good cholesterol. Even small changes add up to lower heart disease risk over time.

For people trained in endurance sports, exercising after eating does not lead to greater fat burning over 24 hours, because the rise in insulin after eating reduces the amount of free fatty acids available for energy use.