let’s go به انگلیسی

From Longman Dictionary

fit‧ness /ˈfɪtnəs/ ●●○ noun [uncountable]

when you are healthy and strong enough to do hard work or play sports

وقتی به اندازه کافی سالم و قوی هستید که بتوانید کارهای سخت انجام دهید یا ورزش کنید

the degree to which someone or something is suitable or good enough for a particular situation or purpose

درجه ای که شخص یا چیزی برای یک موقعیت یا هدف خاص مناسب یا به اندازه کافی خوب است

Example

I liked him instantly, especially as he was a fitness fanatic and his body was solid and taut

Experience, training and fitness sets hotshots apart from so-called Type 2 crews, the infantry of firefighting

Let’s hope he is able to get in some training at his field hospital so that he at least stays in touch with his fitness

Greater levels of fitness and better team organisation are two of the more obvious modern achievements