Because exercise is to stimulate muscle growth, acid is a necessary phenomenon (the degree of feeling is within the normal range). If you exercise without any response, it means that the previous exercise is basically useless and can't stimulate muscle growth. Then, if you just exercise and haven't adapted, the feeling of being sour and high will soon disappear and there will be no obvious feeling. Only when you need to exert yourself or do other exercises will you feel a little sour. If you want to stay healthy, you can't just exercise. Because exercise consumes energy and stimulates muscles, muscle growth needs nutrition, especially protein's supplement, not sugar. Because synthetic muscles need protein, you must eat more foods with high protein, low sugar and low fat. Eat more eggs if conditions are normal, and more steak if conditions permit.