In the beginning of the 19th century.
Answer:
The F stands for frequency, which is how often a person exercises.
The I stands for intensity, which is the amount of hard work one puts into a particular workout. The intensity can be difficult to balance, since the exercise needs to be difficult so that it overloads the body, but not so much so that it could cause injury.
The first T of the acronym stands for time which is how long the workout session is, which depends on the type of workout.
The T stands for type which is whether one chooses a cardio, strength, or flexibility activity.
The FITT helps many be able to plan their individual fitness plan, which can help them achieve a healthier lifestyle.
Explanation:
