I asked the coach in the gym to practice until his muscles ached every day and didn't go home until he was exhausted. It's been four or five days. Why are my muscles not long? How long will it take to be effective? 1, only four or five days, it is impossible to have any effect, at least one or two months, you can see some effects. 2, due to a lot of exercise, lactic acid accumulates in muscles, which will naturally hurt, and will gradually reduce after two or three days. You can apply it with a hot towel, and it will get better faster. Don't exercise one muscle at the same time every day, pay attention to the rest muscles. There is no need to go to the gym every day, just go three times a week. Someone upstairs is right. Fitness practice is persistent, and it must be adhered to for a long time to be effective.