The first change is that your physical fitness will improve. For an easy-to-understand example, you used to climb the sixth floor and go home panting, and you had to take the elevator above the third floor. But now you can climb the tenth floor in one breath, and you won't be breathless with red. It is precisely because of exercise that your physique is enhanced, so your endurance and physical function are also enhanced.
The second change is that your body fat rate will decrease, which means that all the fat on your body will become fine muscle lines, and your body will be more fit than before.
The third change is that your physical fitness has improved. Maybe you were sick before. When the seasons change, the cold virus will catch you. After exercise, the immunity will be improved, and it will not be so easy to get sick in the future.
The fourth change is that your skin will get better. Sweating during fitness will take away toxins from the body, so the skin will get better.