If you’re looking to add power to your serve in tennis, hit really fast balls and at the same time expend less effort, then here is an article with some key drills you need to perform.
The secret to a powerful serve lies mostly in the transition from the backswing into the forward swing – or better said – into the upward swing.
If this transition doesn’t increase the speed of the racquet face and it doesn’t feel effortless, you’re doing something wrong.
Watch the 2 videos in the linked article and concentrate on those key positions in your serve and you’ll develop a lot more power with less effort.