Let’s go back to the early days of Biology class. I still remember how my bio teacher got me into losing 15kg in 2 months. I was a chubby kid. All I need was that one class. We learned about how the body burns Carbs (& Sugar) Fat & Protein.

It’s simple. The body burns down Carb > Fat > Protein. In that order.

“These principles can also be used as aweight loss system. Using the basics of carbohydrate and fat metabolism it makes sense that people have difficulty losing weight when they exercise vigorously for only half an hour. This is because the quick vigorous exercise burns only carbohydrate stores in the liver (ie: glycogen); the body never touches its fat reserves! In contrast, running a marathon (or a nice long walk or jog in the park) causes the body to tap into its fat reserves. This is also the idea behind exercising early in the morning before having breakfast. In the morning your body has been burning carbohydrates to keep all your organs functioning; therefore, in the morning your body has less carbohydrate available to burn because it was slowly getting eaten away during sleep. If you exercise at this point you’ll have to tap into your fat stores earlier than you normally would so that your muscles can get adequate energy to keep going.” – source virtualmedstudent