Mechanical Energy Flow of the Racket Holding Arm in the Tennis Serve Focusing on the Energy Form

Mechanical energy is known to be transferred between a body segment and joint. However, the transformation of this has not been classified. By focusing on racket-holding arm during tennis serve, present study examined translational rotational energies due joint force, investigated kinetic chain from viewpoint energetics. Twenty-two players were asked perform flat services deuce side (i.e., receiver’s right side), three-dimensional coordinates reflective markers attached each player racket collected with motion capture system. The mechanical power acting generated/absorbed by divided into following components: (1) STP = time rate change in torque, (2) JTP generation/absorption (3) JFPt (4) JFPr moment force. findings are summarized below.