Fitness may mean:The state of being physically active on a regular basis to maintain good physical condition.

    * Physical fitness A general state of good health, usually as a result of exercise and nutrition
    * Fitness (biology), an individual's ability to propagate its genes
    * Fitness competition, a form of physique training for women, related to bodybuilding.
    * In mathematics and computer science, the degree to which a given function is optimized; see optimization (mathematics)