Doing any exercise will effectively burn fat, which is fat. When doing exercise, the muscles are stretching the limbs. There are blood vessels in muscles, and blood provides oxygen for muscles. After overload, it is difficult for blood vessels to provide oxygen for muscles, and more blood vessels will slowly grow in muscles. More blood vessels can provide more oxygen, and muscles will be stronger and more explosive accordingly. After exercise, the muscles will secrete lactic acid and feel sore. They will be all right when they go home and apply hot compress. This is a sign of muscle growth. But the corresponding gains are very great, so exercise will never lose muscle, it will only make you stronger.