Answer:
If you decide to start a physical training plan after an extended period of time without physical activity, the main criterion to be followed is progressiveness, that is, to carry out exercises gradually and progressively, managing intensity and weights used in a way that does not produce an excessive load on muscles that are not used to exercise.
Furthermore, to avoid injuries, it is very important to warm up through corrective movements, dynamic stretching and light aerobic exercises; in addition to elongating the trained muscles once the session is over.