Muscle ache after fitness is caused by lactic acid accumulation and inflammation caused by muscle decomposition after training, and the problem is not big. It is recommended not to take medicine. Because this is the process of muscle self-repair. If the pain really affects your life, you can massage it with a little green oil to warm your muscles. But the best way is to warm up before each training, fully stretch after training (these two points are the most important), then take some supplements (creatine, protein powder, or muscle-building powder), take a hot bath at night (pay attention to it), go to bed early, and try to be before 10, which will be much better. If there is no tonic, you can eat something high in protein, not too much, such as 1-2 with bananas, 1 cup of yogurt and 2-3 slices of whole wheat bread.