Contralateral is defined as 'pertaining to the other side'. Ipsilateral is considered the opposite of contralateral and occurs on the same side. When you train one limb at a time there is always an effect, because of neural flow to the contralateral limb even if the limb is unenvolved in direct exercise. Coaches understanding this use specific exercise protocols to keep the contalateral limb always under muscular tension.
Training keeping both arms extended, then lowering one limb and raising it up, then lowering the other limb causes the lifter to keep both arms under muscular tension during the entire exercise. This method of training insures an athlete does not favor an appendage when training bilaterally. This style of exercise may also be used for rehabilitative purposes or simply to augment a normal training regime.
The Pendulum Shoulder/Iincline
On the Pendulum Shoulder/Incline with a determined weight press up with two arms, then lower and press 4 reps with one-arm, while the contralateral limb continually holds the weight extended overhead. Upon completion of the 4th rep keep the limb extended and do 4 reps with the other arm. Once the 2nd arm has completed it's 4th rep leave it extended and begin the process over with a target of 3 reps with each arm. When both limbs have done 3 reps, then do 2 and then 1 rep with each arm.
The goal is 10 reps with each arm (4 reps, 3, 2, 1) adding 5 pounds when a total of 10 reps with the contralateral and ipsilateral arms can be achieved during the exercise.
A great way to Get Strong.