Part II
Carbs or no carbs
Today many people have “forgotten” how to burn fat cells, which is a problem for health maintenance. The main source of fuel nutritionally for majority today is carbohydrates. Most popular carbohydrates are derived from grains that are a relatively new food. It was industrialized and promoted as healthy after agricultural revolution. It has been proved that reducing grains from your diet can improve insulin sensitivity – body’s response to insulin, a hormone that regulates blood glucose and many other functions. Also limiting your total fructose consumption to below 25grams per day can significantly improve insulin sensitivity.
When carbs are consumed on regular basis, the body is always in sugar burning mode and never taps into the fat storages. Carbohydrates are referred to as “dirty fuel” due to the high free radical release when consumed 30-40% of daily intake. To avoid this mess in your body, the reduction of net carbohydrates to less than 40-50 grams per day can improve overall nutrition.
The key to carb limitation is looking at NET carbohydrates. Net cabs are clean carbohydrate amount without the fibre. For instance, an apple has fibre and carbs; subtract the fibre and you will get net carbs. It is better to choose low net carb diet rather than low total carb diet, according to Dr Vanderschelden.
Large amounts of fibre are required in a good diet for two primary reasons. Firstly, the fibre is used in your gut as a prebiotic to feed the good bacteria. Secondly, the fibre is converted to short chain fats which is used as cell fuel and is a sugar replacement in this process.
When to eat? How to eat?
There is a theory floating about that eating 5-6 small meals a day would be beneficial for weight control and avoiding the starvation mode. In nature our ancestors would cycle the periods of feast and famine, which means they would eat one day and the next day might eat less or not eat at all.
The body’s primary fuel source is glycogen derived from carbohydrates and/or protein. When glycogen is depleted, the body goes after the fat stores. Eating 2-3 hours apart, the body will always use glycogen and the fat stores will remain untouched.
Intermittent fasting
Intermittent fasting (IF) is a restriction of the eating window, as oppose to restriction of calories. To go after the fat stores the body has to switch to alternative fuel which is fat. IF can do that and it is not a diet.
The most optimal example of IF is when eating window is 8 hours long and non-eating gap is 16 hours. At first it seems like a lot, but that includes your night sleep. For instance, you finish eating your last meal of the day at 8 pm and you go to bed. The next morning you skip the most “important” meal of the day – breakfast. Breakfast meal is not based in science; it is rather propaganda by the big companies to promote this idea to sell more carbohydrate based packaged foods. Don’t worry because sugar-free coffee and tea is still ok! At around 12pm you can have your first meal of the day eat until 8pm, if you wish.
In this 16h fasting period the fats are being used and ketones are being produced as a clean source of energy. The brain is in favour of ketone bodies as an energy source. Research shows that continuous fasting increased lifespan by 30%, and increased survival rate in animals. It also has been proven by Yoshinori Ohsumi who received Nobel Prize for his work in 2016, that IF gives more health benefits than continuous fasting.
IF health benefits are related to normalization of insulin sensitivity, boosting of mitochondrial energy, increasing growth hormone production, lower inflammation and blood pressure, shed unwanted fat, eliminate sugar, reduce oxidative stress, increase longevity, increase brain function (BDNF and ketones).
Fat Burning catalyst
So, how to set yourself into fat burning mode? Research shows that High Intensity Interval training (HIIT) can largely boost the fat burning process. During explosive, short interval training body will be forced to use fat as energy. HIIT increases human growth hormone (HGH) by 1300% in women and 2000% in men. HGH is longevity hormone which promotes healing, is growth and repair catalyst, anti- ageing, muscle growth and fat loss booster to name a few.
Combining IF and HIIT will allow you to tap into fat reserves more. The best time to work out is in a fasted state –right before your first meal of the day.
Brain function & HIIT
HIIT training in a fasted state have shown to increase up to 400% of brain growth hormone, known as BDNF (brain-derived neurotropic factor). BDNF is responsible for neuroplasticity (making new brain cells) and long term memory. There are only 3 proven ways to increase BDNF:
- Intermittent fasting
- High Intensity Interval Training
- Curcumin – active ingredient in turmeric spice. It has shown to cross blood brain barrier, boosting brain neurotransmitters – serotonin and dopamine, and is an anti-depressant.
References:
https://www.ncbi.nlm.nih.gov/pubmed/14594783
https://www.ncbi.nlm.nih.gov/pubmed/29683919