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Fasting Post-Workout - Good, Bad, Okay?

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  • Fasting Post-Workout - Good, Bad, Okay?

    I've been on a 21/3 IF regimen most days of the week for the past two weeks. It seems to work relatively well for my purposes. My feeding window is between 6 and 9 pm.

    But I work out in the morning, either at 6:30 or 7:30. I crossfit most days. This means that I'm fasting post-workout pretty much every single day. Is this bad?

    I haven't noticed any ill effects, but I just want to make sure that I'm not unknowingly screwing myself over.

    My journal

  • #2
    It depends on the intensity of your workouts! When getting in better condition you will also get the ability to train harder, more intense and dig yourself more down, so if you don't get carbs, b-vitamins and some protein immediately post-workout, you will not recover that well, and soon feel weary and beaten up... When that happen del-load and start getting carbs, b-vitamins and proteins immediately post-workout, preferable also some fast acting carbs intra-workout...
    "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident."

    - Schopenhauer

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    • #3
      IMO, no big deal as long as you feel fine and get adequate nutrition. If you were trying to pack on muscle I would say to get something in you post workout.

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      • #4
        This is what I do also Lift 7:00 fasted until dinner - I normally drink a BCAA supplement around 11:00 - thats it

        Works great for me - I am lean and tight and building muscle too

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        • #5
          Brodude, you totally gotta get plenty of carbs and protein in IMMEDIATELY post-workout or you'll never get swole. Brah.
          The Champagne of Beards

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          • #6
            Lol! All right, I guess it's fine unless I start to feel like crap.

            My journal

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            • #7
              Originally posted by diene View Post
              Lol! All right, I guess it's fine unless I start to feel like crap.
              Yes, just be aware that when you progress with your training/diet it will happen sooner or later! When being LEAN and in very good condition you can easily deplete your glycogen stores in a hard training session and put your body in high demand of energy. And since the body can only deliver around 4 gram( = 33 calories/pound of bodyfat!) of fat from each pound of fat that you carry on your body every 24 hours, it will not get enough energy fast enough if you work out in the morning and eat in the late afternoon. So the body start massively breaking down proteins in lean tissue and convert it to glucose and you feel shitty and like crap when that happens…
              "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident."

              - Schopenhauer

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              • #8
                Whoa! I could never eat that much food in a three hour window! Like a frigging boss!

                I IF 16/8 split, 8pm to 12noon - workout early morning, work (on feet) through day. All fasted, so yes it's possible to go heavy if you need to on fasting (IMO so far). I'd think if you are hydrated and taking bcaa's to keep protein synthesis up, you would be okay. My fast lasts for hours after finishing my workout, and I just space bcaa through my day, until I break fast in the middle of work.

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                • #9
                  Originally posted by Gorbag View Post
                  Yes, just be aware that when you progress with your training/diet it will happen sooner or later! When being LEAN and in very good condition you can easily deplete your glycogen stores in a hard training session and put your body in high demand of energy. And since the body can only deliver around 4 gram( = 33 calories/pound of bodyfat!) of fat from each pound of fat that you carry on your body every 24 hours, it will not get enough energy fast enough if you work out in the morning and eat in the late afternoon. So the body start massively breaking down proteins in lean tissue and convert it to glucose and you feel shitty and like crap when that happens…
                  I'm not really lean yet so I think I'll be okay. The goal is to get lean. I don't think I'd do anything this extreme if I were already lean. I have 25% body fat so I think that's probably enough to feed me.

                  Shield_Maiden -- not being able to eat that much food in a 3-hour window is exactly why I'm doing it. It's a way for me to restrict calories without feeling like I'm restricting. One big meal a day feels more satisfying than 2 or 3 small meals.

                  My journal

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                  • #10
                    Originally posted by Shield_Maiden View Post
                    Whoa! I could never eat that much food in a three hour window! Like a frigging boss!

                    I IF 16/8 split, 8pm to 12noon - workout early morning, work (on feet) through day. All fasted, so yes it's possible to go heavy if you need to on fasting (IMO so far). I'd think if you are hydrated and taking bcaa's to keep protein synthesis up, you would be okay. My fast lasts for hours after finishing my workout, and I just space bcaa through my day, until I break fast in the middle of work.
                    I never have a problem eating all my food in three hours from 6-9pm

                    In fact I look forward to the feast!
                    Feel like a king.

                    I do prefer however breaking the fast after a pm lift session. I lift fasted around 5pm then eat from 6-9

                    I love it.

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                    • #11
                      Originally posted by Gorbag View Post
                      Yes, just be aware that when you progress with your training/diet it will happen sooner or later! When being LEAN and in very good condition you can easily deplete your glycogen stores in a hard training session and put your body in high demand of energy. And since the body can only deliver around 4 gram( = 33 calories/pound of bodyfat!) of fat from each pound of fat that you carry on your body every 24 hours, it will not get enough energy fast enough if you work out in the morning and eat in the late afternoon. So the body start massively breaking down proteins in lean tissue and convert it to glucose and you feel shitty and like crap when that happens…
                      I think I read about that on bay.com, the part about how much energy you can burn from fat. But I don't believe it. We can try to reason through the whole thing. To begin with, I guess you'd have to actually look critically at the study that was supposedly done to prove it, the methods that were used, etc., then draw your conclusions from there to tell wether it was actually a legit study or not.

                      That's just to begin with. But we really can reason through it. You can store 2000 calories worth of glycogen, probably plenty more dependent on your muscularity. So that pretty much leaves you safe unless you're going too low on the carbs and exercising A LOT.

                      Second of all, how much do you really think you can burn in a workout? You'd probably burn several hundred calories after a HARD hour long endurance workout. Most people won't even come close. Because they don't workout that hard. How much do they really burn? Probably 500 at the most.

                      Also, if there really was any truth to such statements, starving people would die before all their fat was gone. But they don't. All the fat goes away first, then muscle, then you die.

                      I suppose I could come up with some more points to support my argument, but I'm lazy. I don't disagree just for arguments sake; I'm just trying to keep it real. Believing in such nonsense only perpetuates fear of food and unnecessary excessive compulsive dieting, that which is undesirable and was also nonexistent during paleolithic times. We don't want that, we want freedom.

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                      • #12
                        Originally posted by Ripped View Post
                        I think I read about that on bay.com, the part about how much energy you can burn from fat. But I don't believe it. We can try to reason through the whole thing. To begin with, I guess you'd have to actually look critically at the study that was supposedly done to prove it, the methods that were used, etc., then draw your conclusions from there to tell wether it was actually a legit study or not.

                        That's just to begin with. But we really can reason through it. You can store 2000 calories worth of glycogen, probably plenty more dependent on your muscularity. So that pretty much leaves you safe unless you're going too low on the carbs and exercising A LOT.

                        Second of all, how much do you really think you can burn in a workout? You'd probably burn several hundred calories after a HARD hour long endurance workout. Most people won't even come close. Because they don't workout that hard. How much do they really burn? Probably 500 at the most.

                        Also, if there really was any truth to such statements, starving people would die before all their fat was gone. But they don't. All the fat goes away first, then muscle, then you die.

                        I suppose I could come up with some more points to support my argument, but I'm lazy. I don't disagree just for arguments sake; I'm just trying to keep it real. Believing in such nonsense only perpetuates fear of food and unnecessary excessive compulsive dieting, that which is undesirable and was also nonexistent during paleolithic times. We don't want that, we want freedom.
                        You are writing a rather long posting without seeing the context of the thread! We are talking about intermittent fasting where a person work out in the morning and eat in the late afternoon and in a calorie deficit. Do you really think that a relative lean woman stores 500 gram of glycogen (2000 kcal) in her body when going for her early morning workout without eating? And since you admit that you are a lazy person, I am not going to do the homework for you, just let me say that people can die from starvation, i.e. various types of illness related to not getting enough energy for their bodies demand, even if they still have fat stored on their body, especially if they also work hard. That’s because of the humans limited capacity to release body fat fast enough to cover the urgent demands…
                        "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident."

                        - Schopenhauer

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                        • #13
                          I have to agree with Ripped. I'm sure there will be some back lash from IF supporters but IMO fasting is just another way to severely reduce your calories and fixate on a pre existing issues with food and here's why:

                          So and as an IF'r if you don't feel that you've worked out hard enough, do you still consume the volume of calories you would if you feel you had a really good work out? What happens if your tired that day? Sick? Do you decide it would be better the do with out the carb load because you might gain a percentage point in body fat?

                          What about when you kill it in the gym and go for your feast but think well yesterday I didn't eat as much and today I blew up the weights, maybe I should lower X and try that for a few days and see what happens.

                          Starving your body for the "perfect" physique is never a good idea. Because perfection is a societal phenomenon that has absolutely nothing to do with reality. Do you really think that paleo man would value a person in their tribe with 3% body fat who doesn't have the energy stores to hunt for the big kill over some one who has 8-12% but can run down an antelope?

                          Perfection is a magazine cover of airbrushed illness.

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                          • #14
                            To be frank, it's dangerous to fast post-workout. Because eating healthy foods is very important after a workout. Try to avoid this in order to stay away from any future health effects.

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                            • #15
                              Originally posted by jefferson123 View Post
                              To be frank, it's dangerous to fast post-workout. Because eating healthy foods is very important after a workout. Try to avoid this in order to stay away from any future health effects.
                              Doesn't matter

                              I fast all day after lifting.

                              As long as daily macro met

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