response: Fitness can also be applied to a machine's ability to function properly.
original_response: fitness can even describe machine's ability to perform a specific function. that's strange, right?
history: I love being physical fit and exercising. I try to keep my body toned. That's good. Physical exercise enhances or maintains fitness and helps overall health. I agree. It helps you be mentally fit and self confidence and a sense of happiness. I love lifting weights. Human society has placed great value on the beauty of the human body. I meant love lifting weights. Although not necessarily fair it's true good looks go a long way. Well, before the Industrial Revolution, being fit meant you could get through the day without too much fatigue. Really interesting. That is cool to know. Carrying out today's activities have a different meaning to me. Nowadays fitness is more about the body functioning efficiently, being healthy, resisting certain diseases, and being able to handle emergency situations. I can see how that makes sense. Having a strong body should help the body resist diseases and parasites.
knowledge: Modern definition of fitness describe either a person or machine's ability to perform a specific function or a holistic definition of human adaptability to cope with various situations.