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Fitness and diet myths that just won't go away

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  • AnnPT77
    AnnPT77 Posts: 32,178 Member
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    not really a myth, but i wish it was:
    1. aging has no effect on metabolism
    2. child birth/pregnancy has little effect after the child is born and the pregnancy is over. . .
    geez i wish that was just a myth

    It's not a myth, in statistical terms (of course individuals can vary). I think people frequently over-estimate it, though. If I use a calculator to get a statistical estimate of my BMR at constant body size, the BMR at 25 and 65 differ by approximately 2 daily tablespoons of peanut butter. That's meaningful, but not exactly overwhelming. (The gap may be proportionately bigger for bigger people; I'm 5'5", 125 pounds, and the real me is 65, not 25.)

    I tend to use Sailrabbit **, because it lets me compare multiple different research-based BMR estimating formulas. All three formulas, the difference between 25 and 65 is similar, ranges from 170 calories to 200 calories difference between the two ages 40 years apart, depending on the specific formula.

    Sailrabbit also lets me add estimated body fat percent, and compare multiple different research-based formulas that take body fat into account. When I do that, and compare myself at 25 & 65 at the same size and body fat percent, the BMR estimates are . . . identical, for all 3 formulas that use body fat percent. Hmm. 😉

    **https://www.sailrabbit.com/bmr/
  • NorthCascades
    NorthCascades Posts: 10,970 Member
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    33gail33 wrote: »
    tappae wrote: »
    ythannah wrote: »
    Theoldguy1 wrote: »
    One needs to "hydrate" and/or bring a water bottle for a 30 minute leisurely walk around the neighborhood.

    Agreed. I normally walk for an hour and I need to restrict water intake for about 30 minutes prior to heading out as there are no public restrooms on my walk route and water goes straight through me. (Although this tactic may be unique to middle-aged lady bladders) If it's very hot outside I do carry a water bottle but don't drink until after the halfway point or my "walk" turns into a sprint.

    I know I'm late to this thread, but I just wanted to say that my personal rule is that I don't carry water for any run shorter than 15 miles. It's totally unnecessary (even at high temps). That means that I haven't carried water on a run since my 40-mile ultra in 2013. During all that time, I've only stopped at one water stop during a race, too. That was at a half-marathon, somewhere around mile 10 or 11. I didn't need the water, but when I turned the corner, I could see the next mile of the course going up a long hill and I needed to stop and think about what I was doing!

    During my ultra, I drank an excessive amount and it might have played a part in me avoiding cramps and a DNF due to dehydration (it was unseasonably warm in October), but I've since learned that it would have been a dangerous amount (10 L in 10.5 hours) if I hadn't have been eating so much sodium. I did have to pee a lot (7 to 10 times at least), which certainly took a few minutes off my finishing time.

    The "need" to hydrate constantly during exercise is certainly a myth and it is one that is propagated by major corporations in order to increase their profits. Actual studies have demonstrated that the winners of major races are often the most dehydrated. I don't know of any evidence that someone has died during recreational or competitive exercise because of dehydration, but I understand that at least half a dozen people have died because of hyponatremia caused by over-hydration and inadequate sodium intake.

    I agree with this. My aunt always brings a bottle of water with her when she goes for a short 1 mile walk. I also see so many people drinking tons off water in hot yoga (it is only 1-1.5 hours). I have never drank water during it. If you are well hydrated you should be okay for a few hours without water. If not, that means you likely aren't drinking enough in general. I drink a TON throughout the day so I just don't have the need to drink water when I only bike/run/walk for 2-3 hours. I have never done an ultra, but I DEFINITELY would have also had to drink then lol.

    Wait ... what? You run or bike for "only" 2-3 hours and don't drink anything? Jesus my throat gets dry in 30 minutes on my spin bike I'd be parched in 2-3 hours.

    Not at all uncommon for me to bike for a couple hours without water. Even when I've got a bottle full of it that's easy and convenient to reach.
  • AnnPT77
    AnnPT77 Posts: 32,178 Member
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    YellowD0gs wrote: »
    Here's a myth that apparently won't go away, that the choice between whole wheat or white breads is only about calories.

    IMO (and this *is* subjective), the nutritional difference is pretty underwhelming, if comparing similar bread white vs. whole wheat, unless a person eats a lot of bread. For example, just to pick a common brand, Pepperidge Farm Farmhouse White vs. Farmhouse Whole Wheat, per 49g slice, white numbers first:

    Calories: 130, 130
    Total Fat: 1g, 2.5g
    Sodium: 230mg, 180mg
    Total Carb: 26g, 23g
    Fiber: 1g, 4g
    Sugar: 4g, 4g (all added sugar in both cases)
    Calcium: 40mg, 40mg
    Iron: 1.7mg, 1.3mg
    Potassium: 50mg, 125mg
    Thiamin: 0.2mg, 0.1mg
    Riboflavin: 0.2mg, 0.1mg
    Niacin: 1.5mg, 2mg
    Folate: 95mcg DFE/0 folic acid, 10mcg DFE/50mcg folic acid

    That's not the best whole grain bread compared to the worst white, or vice-versa; it's an attempt at a fair comparison using a commonly available mainstream brand, and I didn't cherry pick a brand, it was just the first one that came to mind.

    I'd give a slight edge to the whole wheat nutritionally, but it doesn't have the advantage all the way through the nutrient profile, and the differences are pretty small. If I really preferred white bread for enjoyment reasons, it wouldn't be enough difference to sway me, personally. (NB: I prefer whole wheat for taste, if I eat either.)

    Source:
    https://www.pepperidgefarm.com/product/farmhouse-hearty-white-bread/
    https://www.pepperidgefarm.com/product/farmhouse-100-whole-wheat-bread/
  • penguinmama87
    penguinmama87 Posts: 1,158 Member
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    not really a myth, but i wish it was:
    1. aging has no effect on metabolism
    2. child birth/pregnancy has little effect after the child is born and the pregnancy is over. . .
    geez i wish that was just a myth

    This is one of those things that is simultaneously true and untrue, depending on what specific thing you're talking about! I know I spend a lot of time here responding to threads from panicky pregnancy and postpartum women. It is one subject area I do feel I actually know a bit about, and my usual advice is, "Don't panic! Things may feel or seem weird but they're probably totally fine!"

    Though it seems to me that a LOT of the advice people need here is "wait a month and see what happens." For pregnant or postpartum women, you just extend the time period by a few months or a year. :D
  • Noreenmarie1234
    Noreenmarie1234 Posts: 7,493 Member
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    33gail33 wrote: »
    33gail33 wrote: »
    tappae wrote: »
    ythannah wrote: »
    Theoldguy1 wrote: »
    One needs to "hydrate" and/or bring a water bottle for a 30 minute leisurely walk around the neighborhood.

    Agreed. I normally walk for an hour and I need to restrict water intake for about 30 minutes prior to heading out as there are no public restrooms on my walk route and water goes straight through me. (Although this tactic may be unique to middle-aged lady bladders) If it's very hot outside I do carry a water bottle but don't drink until after the halfway point or my "walk" turns into a sprint.

    I know I'm late to this thread, but I just wanted to say that my personal rule is that I don't carry water for any run shorter than 15 miles. It's totally unnecessary (even at high temps). That means that I haven't carried water on a run since my 40-mile ultra in 2013. During all that time, I've only stopped at one water stop during a race, too. That was at a half-marathon, somewhere around mile 10 or 11. I didn't need the water, but when I turned the corner, I could see the next mile of the course going up a long hill and I needed to stop and think about what I was doing!

    During my ultra, I drank an excessive amount and it might have played a part in me avoiding cramps and a DNF due to dehydration (it was unseasonably warm in October), but I've since learned that it would have been a dangerous amount (10 L in 10.5 hours) if I hadn't have been eating so much sodium. I did have to pee a lot (7 to 10 times at least), which certainly took a few minutes off my finishing time.

    The "need" to hydrate constantly during exercise is certainly a myth and it is one that is propagated by major corporations in order to increase their profits. Actual studies have demonstrated that the winners of major races are often the most dehydrated. I don't know of any evidence that someone has died during recreational or competitive exercise because of dehydration, but I understand that at least half a dozen people have died because of hyponatremia caused by over-hydration and inadequate sodium intake.

    I agree with this. My aunt always brings a bottle of water with her when she goes for a short 1 mile walk. I also see so many people drinking tons off water in hot yoga (it is only 1-1.5 hours). I have never drank water during it. If you are well hydrated you should be okay for a few hours without water. If not, that means you likely aren't drinking enough in general. I drink a TON throughout the day so I just don't have the need to drink water when I only bike/run/walk for 2-3 hours. I have never done an ultra, but I DEFINITELY would have also had to drink then lol.

    Wait ... what? You run or bike for "only" 2-3 hours and don't drink anything? Jesus my throat gets dry in 30 minutes on my spin bike I'd be parched in 2-3 hours.

    Not at all uncommon for me to bike for a couple hours without water. Even when I've got a bottle full of it that's easy and convenient to reach.

    I don't go 3 hours without drinking water if I am sitting on my *kitten* doing nothing. Definitely not if I am doing something active.

    I just don't need it. Even in the 90s when I am sweating, haha. I guess it is a personal thing. I prefer to wait until I am done because waiting makes it taste so much better. I never have needed to eat before working out or during but I only eat a few hundred calories during the day until 8pm so that is probably why my body is used to it. I also drink like 100 oz coffee every morning so I have a done of hydration on board.
  • SuzySunshine99
    SuzySunshine99 Posts: 2,984 Member
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    I definitely agree that different people have different hydration needs based on their physiology, not just their size or activity level.

    I think the "myth" part of it comes in when people tout a one-size-fits-all guide to drinking water. The most common recommendation is eight 8-oz glasses a day, but I've seen people post here recommending a gallon or more a day.

    I do kind of shake my head when I see a co-worker, who sits at a desk all day, constantly drinking water. And then getting up every 10 minutes to use the restroom. Yeah...that's a sign that you're over-hydrating.
  • wunderkindking
    wunderkindking Posts: 1,615 Member
    edited June 2021
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    Again with individuality. There are definitely some benefits to whole grain bread, but for me it's just what's encasing my sandwich ingredients (or avocado, or jam or whatever).

    As such the 35 cal slice of sadness is fine, though these days I usually eat the regular old white stuff rather than reduced calories because I over compensated on calorie cutting and it's a painless way to get it back.

    Because I *don't like bread*.

    Husband likes bread. He regularly eats Dave's Killer - whatever he got this week and it's well worth it for him.
  • cwolfman13
    cwolfman13 Posts: 41,874 Member
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    ccrdragon wrote: »
    cwolfman13 wrote: »
    AnnPT77 wrote: »
    YellowD0gs wrote: »
    Here's a myth that apparently won't go away, that the choice between whole wheat or white breads is only about calories.

    IMO (and this *is* subjective), the nutritional difference is pretty underwhelming, if comparing similar bread white vs. whole wheat, unless a person eats a lot of bread. For example, just to pick a common brand, Pepperidge Farm Farmhouse White vs. Farmhouse Whole Wheat, per 49g slice, white numbers first:

    Calories: 130, 130
    Total Fat: 1g, 2.5g
    Sodium: 230mg, 180mg
    Total Carb: 26g, 23g
    Fiber: 1g, 4g
    Sugar: 4g, 4g (all added sugar in both cases)
    Calcium: 40mg, 40mg
    Iron: 1.7mg, 1.3mg
    Potassium: 50mg, 125mg
    Thiamin: 0.2mg, 0.1mg
    Riboflavin: 0.2mg, 0.1mg
    Niacin: 1.5mg, 2mg
    Folate: 95mcg DFE/0 folic acid, 10mcg DFE/50mcg folic acid

    That's not the best whole grain bread compared to the worst white, or vice-versa; it's an attempt at a fair comparison using a commonly available mainstream brand, and I didn't cherry pick a brand, it was just the first one that came to mind.

    I'd give a slight edge to the whole wheat nutritionally, but it doesn't have the advantage all the way through the nutrient profile, and the differences are pretty small. If I really preferred white bread for enjoyment reasons, it wouldn't be enough difference to sway me, personally. (NB: I prefer whole wheat for taste, if I eat either.)

    Source:
    https://www.pepperidgefarm.com/product/farmhouse-hearty-white-bread/
    https://www.pepperidgefarm.com/product/farmhouse-100-whole-wheat-bread/

    Fiber is one of the big reasons why whole grain/whole meal products are recommended. In this case, if you ate a sandwich you would get 2 grams of fiber with the white vs 8 grams of fiber with the wheat. Fiber is something that is typically lacking in the diets of most Americans in regards to even getting close to the RDA. 8 grams for a sandwich gets you a lot closer than 2 grams...and 8 grams is a pretty good fiber hit. Whole grain breads are typically higher in protein as well.

    If it was a one off, I probably wouldn't care, but I eat sandwiches fairly often. I eat Dave's Killer 21 whole grains and seeds. It's 110 calories per slice with 5 grams of fiber and 5 grams of protein. So I eat a sandwich and get 10 grams of fiber and 10 grams of protein just with the bread alone which seems significant to me relative to white bread.

    I don't eat white bread from the store because it is tasteless, texture-less squarish sadness... the fact the my 15 grain bread has better nutrition is simply an added bonus.

    Yeah, there's that as well. The only "white bread" I eat is sourdough.

    I never really had white bread growing up, so I've never had to make any kind of big dramatic switch or anything like that. I've always had whole grain. That's pretty much all my kids know as well...we went to a end of soccer season cookout a couple weekends ago and they had white bread hotdog buns and my kids ended up taking the hotdog out of the bun and just eating the hotdog, which they never do.