Answer: amount of effort being put into the workout
Explanation:
The F.I.T.T principle is a workout plan that can be used to achieve a fitness goal. It includes the frequency, intensity, time and type of exercise performed.
The intensity of the exercise is dependent upon the hard work and effort that a person puts in during the exercise. The moderate to high-intensity exercises are included in strength and cardiovascular training. High intensity can sometimes lead to injury due to overexercise.
If you're working on muscular fitness I'd focus more on the amount of weight you're lifting, along with then number of reps, and the type of excersises you're doing
