Hip joints are highly involved in table tennis and some authors found both pelvis angular velocity and hip joint torques are related to the racket velocity. Others also showed higher lower limb joints ranges of motion for the best players. Hence, the mechanical work generated by the playing side hip can be seen as indicator of the playing intensity associated to the different strokes. The aim of the study was to quantify the hip joint mechanical work during four classical strokes. Motion capture acquisitions were performed on two international players. A biplanar radiographic acquisition was also performed to personalize the biomechanical model. Hip joint velocity and torques were calculated on the dominant side, allowing mechanical power and work to be calculated between the end of backswing and the ball impact. Hip joint mechanical work was found the highest for forehand drive against backspin and topspin forehand drive with pivot. Backhand drive required the lowest hip mechanical work and forehand drive against topspin was found as intermediate. Those results show that backhand can be used as a waiting strike and the use of backspin strokes can be used to accelerate opponent exhaustion but increase the exposition to opponent attack.
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