The inertial theory of tennis was created in 2011-13. Until 2017, the physical principles of the theory have been implemented in the biomechanical framework and then transformed into a set of tennis techniques. Its usefulness was verified by the author during his own tests …show more content…
Classical tennis techniques aim to enlarge the power of strokes by increasing the amount of released energy, what requires significant activation of muscles and strenuous building of appropriate athletic fitness by the player. Inertial tennis was built on the assumption that in order to generate powerful strokes it is much better to use smaller amounts of energy, provided that this energy is concentrated in the smallest possible area of space, released in the shortest possible time, and its losses - that inevitably arise during the transfer of the conserved quantities (energy, momentum, and angular momentum) through the human kinematic chain - are reduced to a minimum. This approach is perfectly in line with the requirement to minimize the player's muscle …show more content…
In each stroke, the motion of the involved kinematic elements is so designed that it leads to the freezing of the kinematic chain along a specific direction. The inertia of moving elements straightens the kinematic chain. Consequently, more and more its subsequent elements stop. Because the conserved quantities generated in individual elements cannot be lost without a trace, during freezing they are transferred to the further, still moving elements. In the final phase of freezing, the last moving element accumulates the conserved quantities of all elements. This leads to a significant increase in velocity and a particularly rapid acceleration of the furthest element of the kinematic chain: the head of the racquet.
The specific properties of the mechanism of freezing allow the player to modify the position of the contact point of the ball with the racquet head until the last moment before the impact. As a result, it is possible to change the direction of ball flight after the stroke by up to several dozen degrees. This means that the intentions of the inertial tennis player are particularly hard to read for the