Volleyball players are generally tall and have long limbs. As you lower the bar, it's important to decelerate it. For someone who is 6-feet tall and long limbed, the floor is farther away than for someone who is five feet. That causes the weights to gather more momentum, greatly increasing the strain on the back and shoulders. In complex workouts, strength moves are combined with speed work to help you gain power and produce the greatest results in the least amount of time.
Complex workouts match pairs of exercises.
First, a resistance exercise is performed to stimulate muscle fibers. Then, there is a plyometric move using the muscles just stimulated. This challenges the muscles at their highest levels of excitement and allows muscle fibers and the nervous system to work together to trick slow twitch fibers into reacting like fast twitch fibers. Then, recovery starts. But because the body doesn't know what to expect next, it taps into its energy stores to overcompensate for the next demand.