The human body is extremely adaptable in its ability to
accommodate itself to the physical demands put upon it.
Progressive adaptation to the specific demands of a physical
activity will result in the increased ability to perform that
specific physical activity. It must be stressed that the
adaptation to or improvement in a specific activity will only
increase the ability to meet that demand generally, not any
other. This means, referring again to our earlier example, that
if players jog to build cardiovascular fitness, then
cardiovascular fitness is what will result. They will not
achieve muscular endurance or strength of the level needed to
sustain repeated sprinting. Training specifically designed to
sustain repeated sprints must involve repeated sprinting.
Therefore, because the body's tendency is to adapt specifically
to demands, volleyball training must be comprehensive and
specific enough to provide the physical ability to meet the
demands for strength, endurance, and flexibility that are made
on the p