You always surprise you on the show is useful for burning fat? How about this, or low intensity, long-term (ie, in the exercise of its fat-burning zone) is running (or heart) is better than higher intensity interval referral (ie, the area of your heart )?
Well, we must find answers to these questions.
RUNNING
Depending on the duration and intensity of your run, your body will depend on carbohydrates (stored as glycogen in muscles and liver) and fat for fuel.
Your body decides the different fuels in different situations. Since yield and fat burn more calories so slowly metabolized, they tend to be used for a longer period compared to carbohydrates.
But the body is the first priority is to keep your blood glucose and glycogen stores. As you become fitter your body becomes more efficient at using fat for fuel while sparing your key reserve carbohydrates.
Someone who is totally unfit for the fatigue faster course is one of the reasons that carbohydrate stores are quickly dissolved and used. Fitter people may take much longer because they have developed the ability to use slow burning fat as fuel, thereby maintaining their energy better.
Since the intensity of exercise increases, which are more dependent on carbohydrates for fuel. Typically, the intensity is above 70% VO2 max (or maximum heart rate for our purposes), the use of carbohydrates as the main source of fuel.