3. An individual training to gain cardio-respiratory endurance may begin in an exercise
program by jogging 2 kilometers at a moderate intensity. The next week, the individual
could increase distance to 2 42 kilometers while still working at the same level of
intensity. Week after week, the overload could be adjusted until the desired level of
fitness is attained.
a. Principle of Progression
b.Principle of Specificity
c.Princinle of Overload
d. Principle of Variation​