Three meals a day is essential. Strictly observe breakfast, have a full lunch, try to eat less or some digestible food for dinner, and don't drink tea or coffee before going to bed. Early to bed and early to rise is the key. Only by having a good rest can you be energetic. Adhere to sports and fitness exercises that suit you. For example: walking, jogging, yoga, Tai Chi, dancing, etc. , mainly to increase resistance.