Attention to them when playing tennis!

• Before you playing tennis muscles and joints warm up thogroughly sure.
• The game before,during and after the game for enough water.
• Hot or humid weather or especially more than a hour to drink water will never be sure when you play tennis.
• When you feel a pain in your chest injury, or when you receive a game to end immediately and contact your doctor.
• Be careful not to put yourself in dangerous positions!