badminton to choose suitable badminton. The right serving area of a regular badminton court is close to the doubles service line with two small marks, and the position between them is the badminton ball speed test area. One hour before the game, ask a professional badminton player to draw hard from one end of the court to the other. If the ball falls between two points on the court, it is a reasonable ball speed. Over or under is not acceptable.