The five most common methods of intermittent fasting try to take advantage of each of these benefits. But different methods will yield better results for different people. “If you’re going to force yourself to follow a certain method, it’s not going to work,” says trainer and fitness expert Nia Shanks. “Choose a method that makes your life easier,” she says. Otherwise, it’s not sustainable and the benefits of your fasting may be short-lived.
Intermittent fasting, commonly referred to as IF, has become all the rage lately, and it doesn't look like the trend is going away anytime soon. The practice of intermittent fasting, or time-restricted feeding, is when a person limits the period of time in which they consume calories down to a limited number of hours. So for example, I practice IF with an eight-hour eating window, which means that I will only eat between the hours of 12 p.m. and 8 p.m.
How It Works: Not completely satisfied with the IF diets listed above? This method takes the best parts of Eat Stop Eat, The Warrior Diet and Leangains, and combines it all into one plan. You also get one cheat day each week (yay!) — followed by a 36-hour fast (which may be not-so-yay for some). After that, the remainder of the seven-day cycle is split up between the different fasting protocols.

Cons: Even though it’s nice to eat a few snacks rather than go without any food for 20-plus hours, the guidelines for what you need to eat (and when) can be hard to follow long-term. The strict schedule and meal plan may also interfere with social gatherings. Additionally, eating one main meal at night — while following strict guidelines of what to eat, and in what order — can be tough. It’s especially hard for those who prefer not to eat large meals late in the day.
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In Prime Women’s recently launched PLATE weight management program, Dr. Kathryn Waldrep recommends eating within a nine hour window and choosing that time frame based on your body’s circadian rhythms. Early risers might eat between 9:00 am and 6:00 pm. Night owls would eat their first meal at noon and finish their last meal at 9:00 in the evening. As more and more research has been done around IF and circadian rhythms, there seems to be more and more evidence on the soundness of this approach to eating for weight management.
In one study, protein and carbohydrates were more efficiently absorbed in individuals who completed a cardio workout after fasting, as opposed to those who consumed a carbohydrate rich breakfast prior to working out. This research indicates that fasting can assist your body to more efficiently absorb nutrients from your post-exercise meals, as well as improve your general health and boost lean muscle mass growth.

There were [no statistical] differences between the low- and high- [meal frequency] groups for adiposity indices, appetite measurements or gut peptides (peptide YY and ghrelin) either before or after the intervention. We conclude that increasing meal frequency does not promote greater body weight loss under the conditions described in the present study.

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