I do 21 hour fasts everyday and one 40 hour fast every two weeks. I find it easy to do. Does anyone have any studies on such fasts or any reasons why it wouldn't be a good idea long term? So much conflicting information.
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Thread: 40 Hour fast?
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03-14-2014, 12:31 AM #1
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03-14-2014, 12:36 AM #2
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03-14-2014, 12:39 AM #3
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03-14-2014, 12:49 AM #4
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03-14-2014, 01:02 AM #5
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03-14-2014, 01:14 AM #6
There are a lot of conflicting, contradictory researchers on the subject and you pretty much need to choose what you believe. Some believe that fasting regulates your metabolism and lets your body test from constant digesting, and some also state they can enter the euphoric state you describe. Others think fasting is bad and encourages your body to burn muscle instead of fat.
However, personally I believe you don't really have a problem, a 40 hours fast doesn't sound like it could be dangerous. Some people want to fast for a month or something and that I discourage... But you can fast for 21 or 40 hours. you don't have to but you can if you believe it is beneficial for your bodyHello to everyone!
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03-14-2014, 01:17 AM #7
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03-14-2014, 01:20 AM #8
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03-14-2014, 01:23 AM #9
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03-14-2014, 02:02 AM #10
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I think the current research is probably learning more towards supporting the beneficial qualities of intermittent fasting, rather than the negatives. I think you'll be fine OP. More than fine in-fact. As long as you get all the necessary nutrients during your 21h fast days, a 40h fast every few weeks should do nothing bad whatsoever. Maybe, maybe you will lose a negligible amount of muscle mass due to catabolism, but really I wouldn't even worry. Unless you aim to be a competing bodybuilder, it won't really matter a damn, especially if you lift heavy and get those nutrients on all the other days.
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03-14-2014, 05:58 AM #11
Hey, its been shown that your 21 hour fasts are beneficial for keeping your BMR elevated (leptin levels relatively constant) where as alternate day fasting (40 hour fast) contributes like any other calorie restriction to decrease in leptin levels and corresponding BMR. But I still like my long fasts too.
Since I'm a noob I can't post links, so check out leangains thread myth busting for details on studies intermittent fasting.
As for alternate day fasting..just google the study "Alternate Day Calorie Restriction Improves Clinical Findings and Reduces Markers of Oxidative Stress and Inflammation in Overweight Adults with Moderate Asthma" and you shall find.
P.S. most of the negatives occur in females so you're fine.Last edited by strongerdefence; 03-14-2014 at 06:09 AM.
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03-14-2014, 08:03 AM #12
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I agree.
While the research is vary far from conclusive, there is a growing body of evidence suggestive of benefits similar to what has been suggested by CR studies, without the significant quality of life issues.
As for duration, it's likely that 18+ hours is the point where more significant physiological impact will be observed (both positive and negative), with some minimal evidence slightly suggestive of some additional/unique protective properties associated with infrequently protracted fasts >24 hours.
There's a hypothesis that properly formulated ketogenic my impart synergistic benefits in part become of overlapping metabolic shifts experienced during nutritional ketosis and during periods of extended (>12 h) caloric fasting.
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03-14-2014, 09:48 AM #13
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03-14-2014, 11:31 AM #17
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03-14-2014, 12:10 PM #19
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That's kinda the point. It's supposed to feel rather horrible to force you to seek out food. Evolution and stuff. However, being human means, that we have the ability to resist our instincts and urges and instead make conscious choices, even if they cause us further pain and discomfort. Fasting is considered a spiritual undertaking in many cultures, because it requires a strong will to accomplish voluntarily. It builds character, discipline and helps to see things from a different angle.
I've never done it myself, but I'll probably give it a shot in the future. Kinda prepping for a contest right now, so I'm 24/7 hungry as it is, not gonna kill myself with fasting.Owner of:
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03-14-2014, 12:14 PM #20
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Perception of hunger is somewhat modulated by body fat and prior diet.
For example, someone with relatively low body fat who is acclimated to consuming high carbohydrate meals every 2 hours (resting RQ >90, for example) is vastly more like to experience acute subjectively reported hunger and objectively observable bouts of hypoglycemia compared to someone who is in nutritional ketosis and is acclimated to caloric fasts of >16 hours (resting RQ<75, for example).
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03-15-2014, 08:49 AM #21
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03-15-2014, 09:03 AM #22
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03-15-2014, 09:24 AM #24
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my uncle will fast about once a year for at least a week. during this time he says he generally feels great. he says he just feels the desire to go on a fast, and then just does it. when i ask him, he says he feels great during and after (the first day is tough) and still functions normally, just no eating food.
i think he would say it's more of a cleansing fast than a spiritual one...
it's not for me, though i wouldn't rule one out in the future.Domicron's Basement Gym and Fun House
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