It doesn't matter, it's a necessary experience of fitness, and it's also caused by muscle fatigue or lactic acid accumulation. It will be the same in the future, but it will be fine if you get used to it. If you want to relieve the pain, you must pay attention to warming up before fitness. After training, you must stretch, relax and shake. After taking a hot bath, you can shake your trained muscles, which can slow down and reduce the pain for a few days. Generally, you should feel a little bit on the third day, which happens to be the second day of training. In addition, the whole body can be divided into two parts, and each part can exercise twice a week, which can further reduce this feeling. My very best wishes to your health