Not necessarily. You said that your muscles still felt sore after the first practice, and then they disappeared, which means that you didn't adapt to that weight before or you seldom exercised before, and then you didn't feel sore, which means that you adapted to this kind of training after practicing for a while, or it may be caused by your incorrect training method! Generally speaking, dumbbells weighing 15KG are enough for ordinary people to practice by themselves. You can achieve your desired goal in different ways. You can improve the practice effect by changing the number, frequency and interval of practice. If you don't want to practice dead muscles, you must rely on the means of recovery after each exercise. To fully relax the muscles in your practice area, all exercises don't have to achieve painful results. For ordinary people, this shows that your practice load has exceeded your maximum exercise load, which is unscientific. Practice must be gradual, and long-term persistence will be effective. The method of fishing for three days and drying the net for two days is no good!