Personal goals and physical condition need to be considered when choosing fitness methods and arranging fitness plans. If the muscles in a certain part feel too tired after training, you can rest this part and practice other parts, and then rest as a whole after the whole body is trained.
Everyone's physical recovery ability is different. Some people need more time to recover, while others can adapt to training faster. So, if you are just starting to exercise, or your training intensity is low, then you can consider taking a plan of two days of training and two days of rest. If you have a certain fitness foundation and your goal is to improve the intensity and frequency of training, then you may need more frequent training and less rest time.
Most importantly, you should always pay attention to your physical condition, adjust your training plan or seek professional advice when you feel tired or injured.