fitness
US /ˈfɪt.nəs/
UK /ˈfɪt.nəs/

1.
the condition of being physically fit and healthy
:
•
Regular exercise is essential for good fitness.
•
She joined a gym to improve her overall fitness.
2.
the quality of being suitable to fulfill a particular role or task
:
•
The fitness of the candidate for the job was questioned.
•
We need to assess the fitness of the equipment for the expedition.