What is the difference between intensity and duration?
Lets start with the relationship between duration and exercise intensity: duration is the amount of time in which you participate in a single bout of exercise, and intensity is a measure of how hard you work during a single workout.
What is the relationship between exercise intensity and time duration?
As exercise intensity decreases, time to fatigue increases. The anaerobic threshold (AnT) is defined as the highest sustained intensity of exercise for which measurement of oxygen uptake can account for the entire energy requirement.
Is duration or intensity more important for cardio?
Opt for Long Duration
According to IDEA Health and Fitness Association, exercising for one and a half to two hours will put your body past the lactate threshold so it starts burning more carbs, and after the carb supply runs low, your system has to switch back to using fat for fuel.