If you are an individual, you must control the intensity and stop immediately every time you feel muscle pain. Being responsible does more harm than good. After the age of 35, there will be physical pain and muscle weakness in rainy days. The research of modern medicine in this field is very specific. You can consult the relevant fitness department without paying any fees.
Secondly, the fitness process must ensure nutrition. The purpose of fitness is to support you to expel excess fat from your body under the condition of adequate nutrition, rather than over-controlling your diet for fitness, which does more harm than good.