1. Too much exercise and too little exercise will damage physical strength in the same way; eating too much and too little will damage health in the same way; only moderation can produce, enhance, and maintain physical strength and health. ——Voltaire

2. Keep practicing day after day. Only with moderate activity can you maintain your enthusiasm for training and improve your sports skills. ——Aristotle

3. Movement is the source of all life. ——Seneca

4. If a person who is immersed in mental work does not move his limbs regularly, it will be extremely painful. ——Leonardo Da Vinci

5. I have loved walking all my life, and exercise has brought me endless fun. ——Leo Tolstoy

6. Stillness is death. Only movement can knock on the door of eternal life. ——Einstein

7. Life is wonderful and physical exercise is endless fun. ——Tagore

8. Human health depends not only on diet, but especially on exercise. ——Pushkin

9. As everyone knows, only a healthy body can have a healthy spirit; if the body is weak, how can the mind and spirit be developed? ——Cai Yuanpei

10. It can be said that the spirit cannot be free unless the body is tortured.

11. However, the so-called hardship is to exercise, not to make them weak to suffer themselves.

12. I would rather my students play tennis to kill time, or at least to exercise their bodies.

——Cai Yuanpei