Ever experienced appetite loss after exercise?

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Replies

  • jaj68
    jaj68 Posts: 158 Member
    sometimes when i get hungry between meals...I will go exercise...because I find it squashes my appetite.
  • KrazyAsianNic
    KrazyAsianNic Posts: 1,227 Member
    I agree. Right after work, I'm just thirsty... it takes at least an hour for me to actually want to eat something.
  • amy_kee
    amy_kee Posts: 694 Member
    sometimes when i get hungry between meals...I will go exercise...because I find it squashes my appetite.

    I was doing that in the beginning and losing a lot of weight that way. Thank you for posting that because I really need to get back to doing that again! I get super hungry at night and my treadmill is right there in the dining room. I think I'll jump on it just before supper time to squash my appetite down again.
  • lombrica
    lombrica Posts: 1,419 Member
    I'm not typically hungry anyway -- part of my "problem" was just eating once a day... but I am really not hungry after most workouts. I try to usually have a protein shake, as I need to get more calories in and want the benefits of the protein... but, if I hadn't found such tasty recipes? I don't think that I would be able to get those in! Ha!
  • MMarvelous
    MMarvelous Posts: 1,067 Member
    I find that I don't need to eat all the exercise calories that day but I do the following day when I'm famished but back to basic calorie allowance.

    I find that after a day where I burn more than 1500 calories i am not hungry but the next day I am MORE than FAMISHED!
  • Jac118
    Jac118 Posts: 34
    Someone correct me if I'm wrong, but I thought it was because, during exercise, your body is diverting its energy away from digestion and towards getting your muscles enough oxygen (increasing blood flow to the muscles and away from the stomach). The "hunger" feeling is your body telling you "okay, i'm ready to eat," but if your body is not focusing on digestion, then you aren't going to feel hungry

    In terms of evolution - if you were running away from a threat (ie flight or fight response), I don't think your brain is going to tell you to stop running and grab some froyo. lol

    I sort of remember learning about this in my evolution of nutrition class back in college but that was 5 years ago and obviously the human body is very complicated and there are hormones involved too -- so feel free to chime in!
  • Sarauk2sf
    Sarauk2sf Posts: 28,072 Member
    Someone correct me if I'm wrong, but I thought it was because, during exercise, your body is diverting its energy away from digestion and towards getting your muscles enough oxygen (increasing blood flow to the muscles and away from the stomach). The "hunger" feeling is your body telling you "okay, i'm ready to eat," but if your body is not focusing on digestion, then you aren't going to feel hungry

    In terms of evolution - if you were running away from a threat (ie flight or fight response), I don't think your brain is going to tell you to stop running and grab some froyo. lol

    I sort of remember learning about this in my evolution of nutrition class back in college but that was 5 years ago and obviously the human body is very complicated and there are hormones involved too -- so feel free to chime in!

    I already responded on the last page - its the hormone peptide YY that gets triggered during exercise, which is basically an appetite supressant.
  • Jac118
    Jac118 Posts: 34
    Someone correct me if I'm wrong, but I thought it was because, during exercise, your body is diverting its energy away from digestion and towards getting your muscles enough oxygen (increasing blood flow to the muscles and away from the stomach). The "hunger" feeling is your body telling you "okay, i'm ready to eat," but if your body is not focusing on digestion, then you aren't going to feel hungry

    In terms of evolution - if you were running away from a threat (ie flight or fight response), I don't think your brain is going to tell you to stop running and grab some froyo. lol

    I sort of remember learning about this in my evolution of nutrition class back in college but that was 5 years ago and obviously the human body is very complicated and there are hormones involved too -- so feel free to chime in!

    I already responded on the last page - its the hormone peptide YY that gets triggered during exercise, which is basically an appetite supressant.

    Yes I understand that - but *why* does our body release peptide YY during exercise. I think its because eating would divert blood to flow to the stomach/digestive tract instead of the muscles and its so your body suppresses appetite to prevent that.
  • Sarauk2sf
    Sarauk2sf Posts: 28,072 Member
    Someone correct me if I'm wrong, but I thought it was because, during exercise, your body is diverting its energy away from digestion and towards getting your muscles enough oxygen (increasing blood flow to the muscles and away from the stomach). The "hunger" feeling is your body telling you "okay, i'm ready to eat," but if your body is not focusing on digestion, then you aren't going to feel hungry

    In terms of evolution - if you were running away from a threat (ie flight or fight response), I don't think your brain is going to tell you to stop running and grab some froyo. lol

    I sort of remember learning about this in my evolution of nutrition class back in college but that was 5 years ago and obviously the human body is very complicated and there are hormones involved too -- so feel free to chime in!

    I already responded on the last page - its the hormone peptide YY that gets triggered during exercise, which is basically an appetite supressant.

    Yes I understand that - but *why* does our body release peptide YY during exercise. I think its because eating would divert blood to flow to the stomach/digestive tract instead of the muscles and its so your body suppresses appetite to prevent that.

    I was just pointing out that it is this hormone because your last paragraph indicated you were not sure and did not know which one.

    The study I quoted concludes as follows:

    "Previous studies have shown that aerobic exercise can cause a transient suppression of appetite that lasts from several hours to two or more days. The mechanism for this effect is unknown, and the effects of resistance exercise on appetite are uncertain. The present findings confirm a transient (1 to 2 h) suppression of appetite during and after aerobic and resistance exercise. The findings suggest that ghrelin may mediate this suppression for both forms of exercise. There was an elevation in PYY during and after aerobic exercise, and this may possibly contribute to appetite suppression. Further research is required to determine how long exercise-induced changes in gut hormones persist and whether the changes have any effect on energy intake. A better understanding of the role of exercise in appetite regulation may lead to a more effective prescription of exercise for weight control. "

    I have not looked into the reasons for why any further but this seems to indicate the exact reason is not clear - but maybe there is a clearer explanation somewhere else.
  • Jac118
    Jac118 Posts: 34
    Yea woops sorry - didn't mean to argue - was just looking for an overall reason (based on evolution) for the hormonal change. I used to be a scientist - can't ever be satisfied without a reason haha

    I found some hypotheses in the literature that basically say the same thing - that we suppress appetite to divert blood flow away from the stomach, but most papers are more concerned with how we can manipulate Peptide YY to make drugs for weight loss. Oh well!

    Thanks for getting my mind running again!
  • Jac118
    Jac118 Posts: 34
    Also same reason why your stomach is cold after exercise? (reduced blood flow?)
  • Sarauk2sf
    Sarauk2sf Posts: 28,072 Member
    Also same reason why your stomach is cold after exercise? (reduced blood flow?)

    I have never really noticed, but I know what I will be doing the next time I exercise! :smile:
  • Jac118
    Jac118 Posts: 34
    Yea check it out! Usually only happens to me during cardio/intervals
  • dshgna
    dshgna Posts: 54 Member
    Don't eat fruit past 4 p.m.

    My trainer (who's also a nutritionist) said that it's harder for your body to burn off the sugar from a piece of fruit, later in the day....than it is to burn it off from a piece of bread.

    Don't take nutrition advice from your trainer. Anyone can call themselves a 'nutritionist'. Seek nutrition advice from a 'Registered Dietician'.

    Your trainer is wrong about your body not being able to burn off the calories later on in the day juxtaposed to earlier on in the day.

    Thank you! I was shocked when I read the first post! Fruits naturally seem a much more healthier choice than bread!
  • dshgna
    dshgna Posts: 54 Member
    I find that I don't need to eat all the exercise calories that day but I do the following day when I'm famished but back to basic calorie allowance.

    I find that after a day where I burn more than 1500 calories i am not hungry but the next day I am MORE than FAMISHED!

    LOL! Yes experiencing this right now! i am famished!
  • dshgna
    dshgna Posts: 54 Member
    Someone correct me if I'm wrong, but I thought it was because, during exercise, your body is diverting its energy away from digestion and towards getting your muscles enough oxygen (increasing blood flow to the muscles and away from the stomach). The "hunger" feeling is your body telling you "okay, i'm ready to eat," but if your body is not focusing on digestion, then you aren't going to feel hungry

    In terms of evolution - if you were running away from a threat (ie flight or fight response), I don't think your brain is going to tell you to stop running and grab some froyo. lol

    I sort of remember learning about this in my evolution of nutrition class back in college but that was 5 years ago and obviously the human body is very complicated and there are hormones involved too -- so feel free to chime in!

    I already responded on the last page - its the hormone peptide YY that gets triggered during exercise, which is basically an appetite supressant.

    Yes I understand that - but *why* does our body release peptide YY during exercise. I think its because eating would divert blood to flow to the stomach/digestive tract instead of the muscles and its so your body suppresses appetite to prevent that.

    I was just pointing out that it is this hormone because your last paragraph indicated you were not sure and did not know which one.

    The study I quoted concludes as follows:

    "Previous studies have shown that aerobic exercise can cause a transient suppression of appetite that lasts from several hours to two or more days. The mechanism for this effect is unknown, and the effects of resistance exercise on appetite are uncertain. The present findings confirm a transient (1 to 2 h) suppression of appetite during and after aerobic and resistance exercise. The findings suggest that ghrelin may mediate this suppression for both forms of exercise. There was an elevation in PYY during and after aerobic exercise, and this may possibly contribute to appetite suppression. Further research is required to determine how long exercise-induced changes in gut hormones persist and whether the changes have any effect on energy intake. A better understanding of the role of exercise in appetite regulation may lead to a more effective prescription of exercise for weight control. "

    I have not looked into the reasons for why any further but this seems to indicate the exact reason is not clear - but maybe there is a clearer explanation somewhere else.

    Thank you for the response both of you:)! It cleared up the WHYs for me!
  • pukekolive
    pukekolive Posts: 237 Member
    Quite a few years ago I lost 5 stone (70lb) in 6 months - I split up from my husband and was quite stressed - a major life change and started swimming in the afternoons waiting to pick up my daughter after school. I was swimming 50 lengths about 3 times a week and it was almost like I became anorexic but the lack of eating came from the amount of exercise I was doing.

    The last thing I wanted to do after swimming so far was eat!
  • Effpcos
    Effpcos Posts: 350 Member
    Also same reason why your stomach is cold after exercise? (reduced blood flow?)

    I noticed that too, always a cold stomach after exercise, even if the rest of me is burning!

    I too am not hungry after exercise, but this week I've been trying to have something, especially milk, cashews or yoghurt. Calcium apparently is very good post exercise.

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