From one of my favorite bloggers: YuriIf you want to know how to burn fat then you need to pay close attention to this article. It will save you time and get you far better results from your workouts!
Depending on the duration and intensity of the exercise, your body will rely on more carbohydrates (stored as glycogen in the muscles and liver) and fat for its fuel.
The point is that your body chooses different fuels during different situations. Because fats yield more calories and are slower burning as they are metabolized, they tend to be used over longer durations when compared to carbohydrates.
However, your body’s first priority is to conserve its blood glucose and glycogen stores. As you become fitter your body will become more efficient at using fats for fuel while sparing your vital carbohydrate reserves.
Someone who is totally unfit will obviously fatigue sooner, one of the reasons being that their carbohydrate stores are more quickly dissolved and utilized. Fitter individuals can exercise much longer because they have developed the ability to use the slow burning fats as fuel, and therefore conserve their energy better.
As the intensity of exercise increases, there is more reliance on carbohydrates for fuel. Typically, intensities greater than 70% of VO2 max (or maximum heart rate for our purposes) will use carbohydrates as the dominant fuel source.
However, this doesn’t mean that working at high intensities doesn’t burn fat.
This is where most people get confused.
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