While dieting or performing intense exercise, your body typically has
less carbohydrate fuel available, so sometimes it will break muscle tissue down to use amino acids as fuel instead.
Not exact matches
It's a sort of vicious circle - the more
carbohydrate eaten, the higher the insulin, the
less stored fat can be accessed to
fuel the body, so more
carbohydrate has to be eaten to provide
fuel instead.
By following a macronutrient ratio of around 70 % fats, 25 % protein and 5 %
carbohydrates for 2 - 7 days, with your daily net
carbohydrate intake limited to 50g or
less, your body will begin to use these circulating ketone bodies for
fuel.
Therefore, as you increase your exercise intensity level the
fuel for your muscles will become increasingly derived from
carbohydrates and
less derived from fat.
If
carbohydrate levels are low in the blood, the body will tap into the fat stores for energy, BUT you may actually burn
less energy (calories) overall because your body will slower the metabolism in order to adapt to the perceived
fuel shortage.
So if you want to reduce your body fat you're going to have to train your body to use more fat as
fuel and
less carbohydrate.
When there are
less carbohydrates in the diet, the body has to rely on fats for
fuel.
Any diet that supplies
less fuel than needed will cause the body to form ketones — this can occur regardless of the levels of
carbohydrate and fat intake in the diet.