You don't need to be in perfect shape to start. Even a clumsy person can learn to play tennis. Tennis is a technical and intellectual competition, and you must constantly judge and reflect. Tennis can exercise people's control and endurance, train your flexibility and agility, and cultivate team spirit and good character.
Tennis is a sport to improve the mind, strengthen the system and evolve the mind. This is a beneficial aerobic exercise. It challenges every muscle in your body, and it can strengthen your heart, legs, shoulders, arms and trunk. You will soon find that tennis also tests and strengthens your thinking and psychology, and also improves your balance and time control. It's all because you are playing tennis. Believe me, I play tennis every day.