exertion

This term describes the active application of force or energy, carrying a connotation of strain and deliberate effort. It is often used to describe the bridge between a goal and its achievement, emphasizing the cost in energy or stamina required to reach the end state. In a grammatical sense, this noun is typically uncountable when referring to the general concept of effort or the state of being strained. However, it can be used as a countable noun when referring to specific instances or individual acts of effort, such as "the exertions of the athletes."