Answer:
The abbreviation of the word 'FITT' is F denotes frequency, I denotes intensity, T denotes time and another T denotes training. These four terms are used to train an athlete.
Aerobic exercise is a type of exercise in which a heart rate of a person is increased which needs more oxygen by doing repetitive exercises.
Race walking, swimming, jogging, tennis, cycling fast and stair climbing are the excercises which improves aerobic capacity of an athlete.