Fitness mostly refers to physical fitness that encompasses two
associated perceptions. One is general fitness, which refers to the
health condition and the state of well-being. The other is specific
fitness, which one measures as his or her ability to carry out certain
specific actions including sports. Four elements contribute to fitness,
and they are exercise, nutrition, hygiene and rest. Others describe
fitness as an organism's capability to deliver a progeny for the
generation next.