Used by former top 10 ATP player Janko Tipsarevic, The TennisFlex is the first racquet integrated tennis-specific resistance training and conditioning device. Created by tennis pros to provide a unique blend of tennis specific swing and rotational resistance, core stability and coordination training. Combining the benefits of tennis racquet with resistance cords to create a tennis specific training device that works for players looking to strengthen their body for long grueling matches or rehab from nagging injuries. Whether you're warming up for the match, training for better balance or trying to get explosive power, the TennisFlex brings a new and dynamic training session to your game.