Explosive power is important to any athlete and a tennis player is no different. Plyometric exercises are a great way to work on building power but if not done with correct form they can easily lead to injury. Today we will look at the box jump. The takeoff and landing positions are just as important as the actual movement itsell, but if not done with correct form they can easily lead to injury.When preparing to take off move into a partial squat keeping your knees out and not allowing your weight to transfer too far forward. At the landing on top of the box you want to land with knees bent, knees out and not allowing your knees to get out in front of your toes.Arm swing may be utilized to drastically increase the power of your entire jump.Perform 20-30 nice controlled reps 2-3 times a week.