"Your ability to meet the exigencies of your lifestyle with ease and room to spare for life's little emergencies." Thus, what constitutes "fitness" for one person isn't necessarily fitness for another. Laborers need a different level of fitness than do office secretaries because the demands of their lifestyle are different."

Another definition is, " The state of well being consisting of optimum levels of strength, flexibility, weight control, cardiovascular capacity, and positive physical and mental heath behaviors, that prepare a person to participate fully in life."