What Fa Yuyin Yang said is that people should live and live according to the laws of natural changes, and increase or decrease clothes and quilts with the changes of seasons. What Yu Shu said is that people should exercise according to the correct health care methods, such as psychological balance, reasonable diet, regular life, quitting smoking and limiting alcohol, moderate exercise and not overworking.
Understanding of Yin-Yang Balance
Only when the yin and yang of the body are in balance can people be energetic, rosy-faced, and moaning without illness. Even if external evils occasionally strike, the healthy qi in the body can spontaneously and quickly expel external evils. Therefore, only people with a balance of yin and yang can live a long and healthy life.
As we said, Yin and Yang are abstract. If you want to make an abstract thing "balanced", you need to "instantiate" it (programming terminology). Qi and blood are the most vivid examples of Yin and Yang. So we really want to do is regulate qi and blood.