Effects of Unilateral, Bilateral and Combined Resistance Training on the Speed and Accuracy of the Serve in Youth Tennis Players

A method of training that increases muscle strength and endurance by using external resistance to a unilateral limb or movement.

A training method that increases muscle strength and endurance by using external resistance on both limbs or movements,

A method of training that uses limbs or movements to increase muscle strength and endurance by external resistance using unilateral and bilateral combined forms,