The movement as a task and its outcome can be influenced by multiple factors as players interact with environment adjusting, creating and coordinating their own psycho-physical responses and body movements depending on the task in hand (perception) and spatio-temporal constraints (action potentials)
Initiating preparation for the stroke that is considered defensive not only influences the stroke mechanics but decreases the levels of forces used in the stroke production. By changing the perception from defensive to counter attacking, the player can neutralize the attacking intentions of the opponent, placing him/her to the unfavorable position at the court
In order to keep lateral momentum as a source of power, the player needs to keep the inertia (lateral direction) without pulling the breaks before the stroke transferring the linear momentum into the forward momentum
Creating the mental projections of future movement, before the physical response is initiated, is always dependable on the dynamic changes of the environment to which we have to be attentive constantly in order to adapt efficiently
Visual search, peripheral vision, gaze in tennis, anticipation
For a player to move the body segments efficiently, there should be optimal combination of the stability and mobility through lowering the center of gravity created by loading the major muscle groups of the lower extremities.
Upper body force creation depends of the elastic capabilities of the muscles of the trunk. The reason the players create a larger upper trunk rotation beyond the hips is to pre stretch the trunk rotator muscles and create a powerful separation angle