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Intermittent Fasting 101: The Complete Beginner Guide

The ‘Intermittent Fasting’ is a way of scheduling your food intake between periods of
occasional (intermittent) food abstinence (fasting) and eating windows. In recent years
intermittent fasting has taken the fitness industry by storm, major credit goes to Martin
Berkhan (founder of ‘Lean Gains’ website) who has promoted it as a nutrition protocol
which allows to maximize fat loss, preserve lean muscle and even gain strength.
Intermittent fasting is extremely popular among fitness enthusiasts who have a
busy lifestyle yet desires to stay fit and lean. But intermittent fasting is nothing new,
our ancestors had to inevitably fast for extended periods during hunting and gathering

Fasting has also been a part of many religions: Hindus calls fasting “Vaasa” and
practices it during special days or festivals, to honor their gods, Islam and Judaism have
Ramadan and Yom Kippur, when it’s forbidden to eat and drink for a set period, In
Catholicism, there are six weeks of fasting before Easter or before Holy Week. Hence,

fasting has always been a part of human history, it is just recently researchers have
begun to show its benefits for health and fat loss.
Intermittent fasting offers a host of benefits which includes appetite control,
cardiovascular function, blood sugar control, increased effectiveness of chemotherapy
(by allowing for higher doses more frequently), neuronal plasticity and neurogenesis (by
offering protection against neurotoxins). All these things make it extremely tempting to
try out and probably makes you wonder why the whole earth is not doing intermittent
Unfortunately, the majority of benefits associated with intermittent fasting are observed
on the animal (rats and monkeys), not human subjects. The studies done on humans
are in poor control, where the diet of non-intermittent fasting subjects is not accounted
for. And the comparison is being made between subjects who are on intermittent
fasting  (consuming whole nutritious foods) and non-intermittent fasting subjects
(consuming processed foods randomly). This sparks up an important
question: ‘Whether it is intermittent fasting or consuming controlled nutritious
calories, which is benefiting the health?’
Thus, there is no definitive answer to whether you should or should not incorporate
intermittent fasting as a diet strategy, as the research on this is pretty young. It is more
like finding your perfect grey.
You Are Already Doing Intermittent Fasting
There are many strategies for doing intermittent fasting  (more on in it later), but there is
one which you have always been doing, it is called ‘sleep’. Yes! When you are asleep at
night for hours, unless you are a person who is munching food in his sleep, you are
technically fasting and probably reaping many benefits of fasting. However, the amount
of fasting period required to observe notable benefits varies from person to person. An
active person might need 14-18 hours of fasting, a sedentary individual might require up
to 20-24 hours of fasting.
P.S: Please do not consider it “The More, The Better” and go on for days without
Intermittent fasting in a nutshell & who should
NOT do it.
Essentially intermittent fasting is not eating for several hours (time may vary from 12-36
hours) and then getting all your calories from 2-4 large meals.
Why larger meals? – Because you have a smaller window of eating, you need to eat
more calorie-dense meals.  This makes intermittent fasting an attractive strategy for

binge eaters who like to hog food instead of eating it. And these are the people who
should definitely not do intermittent fasting and probably most of the other diets such as.
Keto, Carb-Cycling, etc, these people need to develop healthier nutritional habits first. If
you are someone who has a healthy relationship with food, been eating nutritionally
dense foods from a while and wishes to explore health and fat-burning benefits of
intermittent fasting, you are in the right place.

Fasting does not mean fat loss: Calories still
Anecdotally speaking, I have trained numerous clients over the past few years who
used to skip breakfast and directly eat in the afternoon after waking up. Technically they
were fasting for 12-16 hours yet they were overweight. And after adding breakfast and a
structured meal plan, most of them lost weight.
A recently published research done by a team at Oslo University Hospital in Norway
compared the effects of intermittent fasting vs traditional caloric restriction for one whole
year (one of the most reliable and robust studies on this subject) and found no
significant difference between the two, in terms of weight loss and weight maintenance.
Hence, simply fasting won’t generate fat-loss and an array of health benefits, the quality
and more importantly the number of calories you are consuming matters.

Major Benefits of Intermittent Fasting

  1. Enhanced fat oxidation
    Insulin and glucagon are the two hormones which are primarily into play here. Insulin
    acts as a nutrient transporter delivering nutrients to their targets i.e. amino acids to
    muscle tissues, free fatty acids to adipose tissues and glucose to mitochondria and liver
    (for glycogen storage). Glucagon, on the other hand, is a nutrient extractor, it makes the
    liver release glucose by breaking down glycogen and forces adipose tissues to oxidize
    free fatty acids.
    In the absence of food for extended hours (as in case of fasting) insulin levels drop
    down and glucagon levels rise. Once liver glycogen stores are emptied, the body begins
    to oxidize adipose tissues for energy requirements. This can result in elevated fat
    oxidation, causing slightly more fat mass reduction especially in the stubborn regions of
    the body.
  2. Better Dietary Adherence
    Perhaps the biggest issue with any fat loss diet is the ability to stick with it. On a calorie
    restricted diet, you are consuming less than your body’s need. And rarely people like to
    cut off certain foods and eat less than they used to. Intermittent fasting does not limit the
    types of food you can eat like in case of a Keto or Paleo diet.
    Additionally, since you have a narrow eating window, you get to eat 2-3 big meals which
    do not make the mind experience the common diet fatigue. Initially, hunger pangs are
    pretty bad during the morning (after skipping breakfast) and late nights (after consuming
    an early dinner) but eventually, hormonal homeostasis settles this issue.
  3. Greater Muscle Pumps and Growth
    As the body is getting food at limited times, it becomes more efficient in nutrient uptake.
    Insulin sensitivity increases which enhance the amount of glycogen body can store in
    muscle tissue, causing greater pumps during the workout (given you are consuming a
    moderate/high carb meal pre-workout). Also, the ability to uptake amino acids from
    bloodstream increases which may help stimulate more muscle growth.
  4. More Focus & Alertness During Fasted State
    This is perhaps something anecdotal, some individuals experience a greater level of
    mental focus and alertness while some do not. One reason could be that digestion as a
    process consumes a lot of energy and eating a meal rich in carbohydrates releases
    serotonin which gives a sense of relaxation. In a fasted state these two issues do not
  5. You learn the Difference Between Real Hunger & Mental Hunger

One profound benefit of intermittent fasting is that you gain the ability to distinguish
between real hunger & mental hunger. Generally, when people experience hunger, it is
not true physiological (body) hunger, but rather psychological (mental) hunger. The
better you know the difference between the two, the better you are able to sync with
your body’s true need. This prevents weight gain in future without gauging calories all
the time.
Other Health Benefits of Intermittent Fasting
 Blood lipids levels including triglycerides and LDL cholesterol
 Resting blood pressure via changes in sympathetic/parasympathetic activity.
 Inflammation in the body (including Cytokines, CRP<, IL-6, TNF, BDNF, and
 Development of cancer
 Cellular turnover and repair
 Growth hormone release in the later stage of fast
 Metabolic rate stimulated by epinephrine and norepinephrine release
 Blood sugar  levels by reducing blood glucose and enhancing insulin
 Cardiovascular function by offering protection against ischemic injury to the
 Chemotherapy effectiveness by allowing for higher doses more frequently
 Neurogenesis and Neuronal plasticity by offering protection against

Different Strategies To Implement Intermittent
24 Hour Fast
This is fairly a simple strategy, you eat a balanced caloric deficit diet throughout the
week and one day (preferably Sunday) you do not consume any food. For example,
let’s say your daily maintenance calories is 2,500 Kcal.
Here are two ways you can distribute your weekly caloric intake:
1. Monday-Saturday: 2200 Calories i.e. 300 calories below maintenance
Sunday: Complete Fasting i.e. 2500  calories below maintenance
This is a great way of creating a larger weekly caloric deficit, in this case, it is ~4300
Calories. [ 300×6 (normal days) + 2500 (fasting day) ]

Another way can be adding a planned ‘Cheat Day’ before the ‘Fasting day’ where you
consume whatever you want using ad libitum. The goal is to eat until you are full, not
until you overeat and feel sick.
2. Monday-Friday: 2100 Calories i.e. 400 calories below maintenance
Saturday: ‘Cheat Day’ anything & everything under 4000 Calories
Sunday: Complete Fasting i.e. 2500  calories below maintenance
In this case, the weekly caloric deficit is ~ 3000, pretty decent, given you are able to
have an entire cheat day once a week.
20:4 Intermittent Fasting
In this protocol you do not have an entire day of fasting, instead, you fast for 20 hours
every day and have a 4-hour eating window. This is great for people who have low
maintenance calorie requirement or for individuals aiming to get extremely lean
consuming very little calories per day, as it allows you to consume 2 large meals in that
short eating period.  
16:8 intermittent fasting
This is probably the most famous intermittent fasting protocol on the internet
popularized by Martin Berkhan, founder of ‘Lean Gains’ website. In this technique, you
fast for 16 hours a day, preferably from a night before to afternoon the following day.
The simplest way of employing this method of intermittent fasting is to skip the breakfast
and consume the lunch as your first meal of the day.

Q1. Will I lose my gains if I do not eat for so long?
Ans1. Eating 5-8 meals throughout the day is a commonly accepted norm in order to
stay ‘anabolic’ a state where the body maintains its positive nitrogen balance preventing
muscle breakdown. However, research shows that positive nitrogen balance is a
function of total protein intake  (precisely amino acids) and not the number of meals you
consume a day. Thus, fasting won’t make you lose your gains given your protein intake
is in check.

Q2. What can I consume during the fast?
Ans2. During the fast 3-4 servings of branched-chain amino acids (10g each) can be
consumed to ensure a positive nitrogen balance. Also, unsweetened green tea, black
coffee, and calorie-free flavored water can be consumed. Water intake of 4-6 liters is
essential during a fast for keeping your body hydrated, it also tricks your mind by
keeping your stomach full (pathways for satiation and quenching thirst are the same in
the brain).
Q3. What if I am not able to do intermittent fasting?
Ans3. If you decide to try intermittent fasting, do not go the ‘cold turkey’ method and
start with 24 hours fast. Start slowly by adjusting regular mealtimes by an hour, then
start fasting 12-14 hours and then gradually try more aggressive approaches. If it works
for you ‘Superb!’ If not, do not worry intermittent fasting is not end-all, be-all

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