It is not usually 30 minutes of exercise that burns fat; the breakdown of fat begins to function at the start of exercise. Pre-exercise usually starts with the breakdown and consumption of glucose in the blood to provide short-term energy consumption. After 30 minutes of exercise, the glucose in the blood has been depleted, and the adipose tissue becomes the main energy supplier, thus achieving the effect of fat consumption. However, it should be noted that excessive exercise may cause adverse consequences, such as excessive decomposition of fat will cause a large number of ketone bodies to be produced, which will increase the burden on the liver and kidneys, and is also prone to damage muscles and joints. It is recommended that people who need to lose weight should reduce weight scientifically under the guidance of professional doctors.