The problem is that too many people jump on the fasting bandwagon without understanding how to assess its impact. Once a plan has been integrated into your everyday life, you should take time every week or month to analyze how things are going. Even if weight loss is your primary goal, it’s important to consider how fasting is affecting other aspects of your health, such as your energy levels, ability to exercise and digestion. Here are some questions you should ask yourself.
BUT I stopped losing weight since last 2 weeks, so I stopped doing IF for last a week and my tummy looks same as before and I gained 3/4 lbs back. I am trying to do IF again but I cannot, because I’m getting constantly hungry. I used to start Fasting at 7pm & & break at 11/12pm next day. But My new job schedule is from 5:30, so its hard for me to wait until noon. I tried a different schedule from 4pm to 8am but I get hungry at night, so it didn’t help me either. Please help me.
Intermittent fasting is hard in the contemplation, of that there is no doubt. “You go without food for 24 hours?” people would ask, incredulously when we explained what we were doing. “I could never do that.” But once started, it’s a snap. No worries about what and where to eat for one or two out of the three meals per day. It’s a great liberation. Your food expenditures plummet. And you’re not particularly hungry. … Although it’s tough to overcome the idea of going without food, once you begin the regimen, nothing could be easier.”
Some of the best evidence on the impact of fasting on bodyweight and fat comes from a December 2018 systematic review. The researchers looked at randomized controlled trials of intermittent fasting and found that the people who fasted lost about 4 to 8 percent of their original bodyweight, on average. So fasting worked, but, interestingly, it didn’t outperform regular, continuous calorie restriction (“eat less every day” dieting), and it didn’t lead to dramatic weight loss.
The best long-term diets, no matter what their rules entail, are the ones that are least difficult to maintain—and again, in this regard, intermittent fasting isn’t inherently superior to anything else. “Are you making changes in your behavior? Have you learned positive habits so that when you go back to not fasting, you’re going to be a healthier eater?” Sasson asks. “I know people who fast because they think, Okay, I’m going to be really bad and overdrink or overeat, and then two days a week I’m going to have a clean life, and that’s just not how it works.”
3 days in a 16:8 ration – my body loves it. I don’t feel famished and look forward to my 8 hrs of eating window. I keep calories in check with a healthy balanced diet. My exercise begins after my last hour of fasting, I eat a few fruits (mango and raspberries) and an avocado (topped with a homemade crushed walnut dressing) and I’m good to lift weights and run. My body feels light and healthy. Amazing solution to any fitness junky.
That’s the principle behind the diet method known as intermittent fasting. Unlike many popular diets, intermittent fasting has the backing of scientific research (including a massive 2017 study analysis by the International Society of Sports Nutrition), which suggests that intermittent fasting is just as effective as daily calorie restriction—sometimes better—at improving body composition. Furthermore, intermittent fasting doesn’t involve any calorie counting, and may suppress hunger better than traditional low-calorie diets.
Side effects of fasting include dizziness, headaches, low blood sugar, muscle aches, weakness, and fatigue. Prolonged fasting can lead to anemia, a weakened immune system, liver and kidney problems, and irregular heartbeat. Fasting can also result in vitamin and mineral deficiencies, muscle breakdown, and diarrhea. When you drink laxative concoctions during a fast, there is an increased risk of fluid imbalance and dehydration.
As you pray and fast, you will call on God, and He will answer you. Answered prayer is the quintessence of praying and fasting. If I were to share with you the five or six pages of the prayer journal I prepared prior to my first forty-day fast, and then walk you back through my journal since then, you would see one thing: My prayers were answered. They are still being answered. There is something to the disciplines of prayer and fasting. I could point you to every experience of long-term fasting where God has answered my requests before Him. This does not mean they were answered as I preferred, but it did not matter. He had worked in my heart, and I was released, fully confident that God was ordering my way. When we humble ourselves before the Father, and when God sees we are serious about giving Him our broken spirits, He begins to do things we have never seen before. It’s empowering. It sensitizes us to the needs of others at home and overseas as we suddenly find ourselves quietly praying for people, events, and situations with the knowledge that our prayers not only will be heard but that the Father will answer them.
Because we don't enter the fasted state until 12 hours after our last meal, it's rare that our bodies are in this fat burning state. This is one of the reasons why many people who start intermittent fasting will lose fat without changing what they eat, how much they eat, or how often they exercise. Fasting puts your body in a fat burning state that you rarely make it to during a normal eating schedule.
Of the two most popular methods, Sasson leans toward the 5:2 schedule as slightly more manageable, since you’re only reducing your intake twice a week. But again, that’s contingent on you being a responsible dieter on your days of lowered caloric intake, which requires an immense amount of discipline—especially when it comes to remembering to drink water. “You can go a long time without food, but only a few days without adequate hydration,” she warns.
4) A sensitivity to God’s voice. The New Testament prophetess Anna is praised in the book of Luke for being a devoted servant to God and His temple. Because she regularly fasted and prayed, she was able to hear the voice of God speak clearly to her the day that Baby Jesus was brought into her temple to be dedicated. She knew He was the Christ and told everyone who would listen about His arrival. When we detox the spirit and become consumed with desire and praise for God, we become sensitive to His voice. Like Anna, when God speaks to us in the midst of chaos, we’ll still be able to pick out His voice and know what He wants us to do because we have trained our ear to hear Him through fasting, prayer, study and praise.
So: The first two weeks of intermittent fasting will suck. “Like anything else, fasting becomes easier the more you do it,” Fung says. You’ll likely experience side effects (lack of concentration, irritability, headaches, maybe constipation), and you may feel hungry, but you shouldn’t feel weak, he adds. Learn how to cope with these and know that if you can power through the first 7-14 days, you’re golden.
In section 109, of the same book, Yudhishthira asks Bheesma "what is the highest, most beneficial" and fruitful "of all kinds of fasts in the world". Bheeshma says "fasting on the 12th day of the lunar month" and worship Krishna, for the whole year. Krishna is worshipped in twelve forms as Kesava, Narayana, Madhava, Govinda, Vishnu, the slayer of Madhu, who covered the universe in three steps, the dwarf (who beguiled Mahabali), Sridhara, Hrishikesha, Padmanabha, Damodara, Pundhariksha. and Upendra. After fasting, one must feed a number of brahmans. Bheeshma says " the illustrious Vishnu, that ancient being, has himself said that there is no fast that possesses merit superior to what attach to fast of this kind." 
In more recent years, many churches affected by liturgical renewal movements have begun to encourage fasting as part of Lent and sometimes Advent, two penitential seasons of the liturgical year. Members of the Anabaptist movement generally fast in private. The practice is not regulated by ecclesiastic authority. Some other Protestants consider fasting, usually accompanied by prayer, to be an important part of their personal spiritual experience, apart from any liturgical tradition.
Even though you are skipping breakfast, it's still important to stay hydrated. Make sure to still drink enough water. You can also have herbal tea. The catechins in tea have been shown to enhance the benefits of fasting by helping to further decrease the hunger hormone ghrelin, so you can make it until lunch and not feel deprived. Since you’ve increased your fasting period an extra four hours, you need to make sure your first meal (at noon) has enough healthy fats. The burger in the 8-to-6 window plan will work well, and you can add more fats in with your dressing or top with an avocado!
The purpose of fasting is never explicitly stated in Scripture but its connection to penitence, mourning, and supplication suggests a self-denial that opens one to God and to the immaterial aspects of life. Inasmuch as food and drink typify life in the flesh and all its demands and satisfactions, their absence or rejection speaks to the reality of a higher dimension, one in which the things of the spirit predominate. The theology of fasting, then, is a theology of priorities in which believers are given the opportunity to express themselves in an undivided and intensive devotion to the Lord and to the concerns of the spiritual life.
When Varady and her colleagues conducted a study that combined alternate day fasting and exercise, they allowed the participants to pick whether they wanted to exercise on a feasting or fasting day, and found there was no strong preference one way or the other. But the researchers were surprised the dieters actually reported feeling more energetic on fasting days.
Kickstarts ketosis: Usually, reaching full ketosis takes careful planning and extreme carb limiting, but intermittent fasting provides a shortcut to this fat-burning state. Once your body drains glucose — its primary source of energy — it is forced to burn through its fat reserves for energy in a process called ketosis. Ketosis improves your blood chemistry, reduces inflammation, and helps you drop weight fast. To really burn through extra fat, combine your intermittent fasting with a keto diet. Learn more here about why keto is more effective with intermittent fasting
How can you know if you are praying and fasting according to God's will? Are you praying and fasting for things that honor and glorify God? Does the Bible clearly reveal that it is God's will for you? If we are asking for something that is not honoring to God or not God's will for our lives, God will not give what we ask for, whether we fast or not. How can we know God's will? God promises to give us wisdom when we ask. James 1:5 tells us, "If any of you lacks wisdom, he should ask God, who gives generously to all without finding fault, and it will be given to him."
In a physiological context, fasting may refer to the metabolic status of a person who has not eaten overnight, or to the metabolic state achieved after complete digestion and absorption of a meal. Several metabolic adjustments occur during fasting. Some diagnostic tests are used to determine a fasting state. For example, a person is assumed to be fasting once 8–12 hours have elapsed since the last meal. Metabolic changes of the fasting state begin after absorption of a meal (typically 3–5 hours after eating).