所有打网球的人都有体会,发球是一项比较难掌握的技术。在无人指导的情况下,业余选手很少能够掌握这项技术,多数发出的球软弱无力,根本不具威胁性。所以这些人在比赛时,无法在发球上占据优势,从而失去了获胜的机会。 要想提高发球的水平,必须掌握许多方面的技术,包括技术动作、落点控制等。 发球动作: 我们发现发球出现失误,绝大多数是由于抛球不当的原因。所以,我们要对抛球的动作进行仔细的分析。 抛球时,肩膀的垂线假设经过一个钟表面的12点,那么,左手抛球时,球的垂线经过钟面的1点位置。对于左撇子,球的垂线当然是经过11点位置。这个 All people who play tennis have experience, serve is a more difficult to master the technology. In the absence of a single instructor, amateurs rarely get the grip of the technology, most of the balls are weak and simply not threatening. So these people in the game, can not dominate the serve, thus losing the chance of winning. To improve the level of serve, we must master many aspects of technology, including technical action, placement control. Service Action: We found that service errors, the vast majority of the reason is due to improper throwing. Therefore, we must carefully analyze the action of throwing the ball. When throwing the ball, the vertical line of the shoulder assumes 12 o’clock over one clock face. When the left hand throws the ball, the vertical line of the ball passes through the 1 o’clock position of the clock face. For left-handed, the ball’s course is past 11 o’clock. This one