fitness
n. uncountablen. the state of being physically healthy and strong. You usually achieve this through regular exercise and eating well.
n. the condition of being physically fit and healthy, often as a result of exercise and proper nutrition. In a biological context, it refers to an organism's ability to survive and reproduce in a particular environment.
She goes to the gym every day to improve her fitness.
The coach designed a specific training program to help the players reach peak fitness before the tournament began.
While cardiovascular fitness is essential for endurance athletes, a balanced routine should also incorporate strength training and flexibility to prevent injury and ensure long-term health.
From fit + -ness. First attested in the 16th century, with the physical sense from 1935.
Uncountable when referring to physical health; countable in evolutionary biology when measuring the reproductive success of specific genotypes.