I saw a large increase to my Heart Rate Variability (HRV) when I started intermittent fasting a couple weeks ago. I no longer snack or eat after dinner and my HRV has gone up and seems to be more stable.
Everything in biology only makes sense when it can be viewed through the lens of evolution. This study just confirms that. We evolved with long periods of fasting because food wasn't constantly available. It makes sense that our general functioning is improved in those circumstances.
True. We are still optimized for hunter gatherer type living. It could take a million years before we are optimized for office work unless we force it with science.
Why not? There could be metabolic pathways/mechanisms that are beneficial and are only active during a fast. If some condition (fasting) were present throughout our evolutionary history, it makes sense that some mechanism would evolve that exploits it.
Its not without food. Its without food for a longer period of time. Its also not saying you are starving or losing a lot of weight or anything like that either.
But it does make sense. The first easy one, digestion takes a lot of energy, packing on weight for survival might be more efficient close to that meal timing too. When we need to hunt for more food, it would make sense we utilize slow burning fuel instead,and enhance our senses so we are more likely to survive. The way we live now is still so new to our biology, we haven’t had enough time to adapt to this. Agriculture has only been in full swing for about 10k years which is a blip in our history. Our bodies are more hunter gatherers than it is office worker optimized. It might take a million years to get to that unless we use science to force it in the coming decades. But today we are still optimized for hunter gatherer. A lot of things start making sense when you think of it from that perspective.
As someone who did IF about 6 years ago - and now I am forever changed, I can say that it takes some getting used to.
Nowadays I can go 24 hours with 100-250 calories. Not like I do that often, but occasionally I am traveling and just not in the mood for anything because my hunger just doesn't control me in any way. I can basically tell my stomach to leave me alone. When I feel a headache is coming, I have some nuts or a piece of fruit or something light and then I do one meal a day.
I only wanted to lose like 20lbs, but here I am, 50lbs down and just stays there now. But to begin with, you can't just dive into a 14 hour fast without your body throwing a fit and giving you a headache.
Really? It's not too hard for me. I mean we sleep about 8 hours a day so that's most of the time. That means you can eat between 10am - 8pm. I've been trying 16:8 (fasting 16 hours) so that leaves me with 10am-6pm which is a little early for dinner but doable. I just have to remember to get all my snacks in before then and I'm set for the next day
Replying to you saying it takes some getting used to. I simply described my experience with it, for me it wasn’t too difficult as most of the fasting time is sleeping anyway.
And for someone who does not fast at all and eats at regular intervals will probably have a hard time fasting for 14 hours, which represents more than a full day for people.
I think you misunderstood the timing they mentioned. It’s easier when roughly 7-9 hours that you might be sleeping is half or most of that time. If you stopped eating at 4pm and woke up at 8am,and eat breakfast, that’s a 16 hour fast.
Or if you skip breakfast and stop eating at 8pm and have your first meal at noon, that’s also 16 hours.
It def hard the first few times you do it. But gets easier as you get used to it. I was eventually able to get to 3 days and wasn’t too hard other than work events getting in the way.
May I ask what your average energy requirements where/are? My job requires me to be moving constantly and I also work out 3/4 days per week. I can’t see myself only consuming 100-250 calories every 24 hours and expect to be fully functional.
Yeah. I stop eating at 9pm then nothing until noon when I have my fast break. Have done this for years. It didn't significantly change anything. I think most of this is placebo.
How much of the benefit comes from calorie restriction or more intelligent choices? That's always the hard part when it comes to studies on humans... We do better when you make us think about what we're eating. It's why everything from keto to raw vegan "works" for most people, most of the time.
Does a certain amount of food over 10 hours really have a different effect than the exact same food over 14?
>Does a certain amount of food over 10 hours really have a different effect than the exact same food over 14?
Yes, it maximizes time the body spends using stored energy over a constant influx of calories and results in some interesting and potentially very significant health benefits. The effects of intermittent or periodic fasting go beyond just weight loss.
> For example, if you eat your first bite at 9am, you must eat your last bite by 7pm.
I wonder if this study still holds true for the hours asleep. So if your last bite is at 6:30 PM and first bite is at 8:30 AM would these results still hold?
Purely anecdotal but I notice that I am hungrier when I eat breakfast than if I had just skipped it. It’s like the act of eating makes me want to eat more. Maybe it’s psychological.
Being Hangry is created from the habit of eating 3 meals a day(or just a very strict eating schedule) Breaking habits and consistency can do that to people. New habits can be learned. That also goes to show how important developing strong habits are.
John-Footdick | 2 years ago
I saw a large increase to my Heart Rate Variability (HRV) when I started intermittent fasting a couple weeks ago. I no longer snack or eat after dinner and my HRV has gone up and seems to be more stable.
https://www.reddit.com/r/Garmin/s/nLj9kEAqHM
psirjohn | 2 years ago
Everything in biology only makes sense when it can be viewed through the lens of evolution. This study just confirms that. We evolved with long periods of fasting because food wasn't constantly available. It makes sense that our general functioning is improved in those circumstances.
Dogcatnature | 2 years ago
We were not designed to eat 3 full meals a day.
Kracus | 2 years ago
No but our ancestors wished they could, hence our predicament.
I wonder if some day our bodies would mutate/evolve to function better with 3 meals a day?
gjklv | 2 years ago
So what are we going to do to fix it?
gid_hola | 2 years ago
gee i dont know, maybe not eat 3 meals a day? This isn't exactly rocket science
zangrabar | 2 years ago
True. We are still optimized for hunter gatherer type living. It could take a million years before we are optimized for office work unless we force it with science.
TBSJJK | 2 years ago
It doesn't make sense that our functioning improves without food.
INToxicated47 | 2 years ago
Why
thing188 | 2 years ago
Why not? There could be metabolic pathways/mechanisms that are beneficial and are only active during a fast. If some condition (fasting) were present throughout our evolutionary history, it makes sense that some mechanism would evolve that exploits it.
Lothric_Knight420 | 2 years ago
Try it and see for yourself. You’ll be surprised
uzu_afk | 2 years ago
Its not without food. Its without food for a longer period of time. Its also not saying you are starving or losing a lot of weight or anything like that either.
zangrabar | 2 years ago
But it does make sense. The first easy one, digestion takes a lot of energy, packing on weight for survival might be more efficient close to that meal timing too. When we need to hunt for more food, it would make sense we utilize slow burning fuel instead,and enhance our senses so we are more likely to survive. The way we live now is still so new to our biology, we haven’t had enough time to adapt to this. Agriculture has only been in full swing for about 10k years which is a blip in our history. Our bodies are more hunter gatherers than it is office worker optimized. It might take a million years to get to that unless we use science to force it in the coming decades. But today we are still optimized for hunter gatherer. A lot of things start making sense when you think of it from that perspective.
wiser_time | 2 years ago
14 hours of fasting does not improve my mood.
WaycoKid1129 | 2 years ago
You’re not doing it right, go 24 hrs then you’ll feel it
shadowtheimpure | 2 years ago
Makes me grouchy and leaves me with a short temper.
0neM0reLight | 2 years ago
Same here lol. It gives me headaches as well.
an0therblizzard | 2 years ago
As someone who did IF about 6 years ago - and now I am forever changed, I can say that it takes some getting used to.
Nowadays I can go 24 hours with 100-250 calories. Not like I do that often, but occasionally I am traveling and just not in the mood for anything because my hunger just doesn't control me in any way. I can basically tell my stomach to leave me alone. When I feel a headache is coming, I have some nuts or a piece of fruit or something light and then I do one meal a day.
I only wanted to lose like 20lbs, but here I am, 50lbs down and just stays there now. But to begin with, you can't just dive into a 14 hour fast without your body throwing a fit and giving you a headache.
magenta_mojo | 2 years ago
Really? It's not too hard for me. I mean we sleep about 8 hours a day so that's most of the time. That means you can eat between 10am - 8pm. I've been trying 16:8 (fasting 16 hours) so that leaves me with 10am-6pm which is a little early for dinner but doable. I just have to remember to get all my snacks in before then and I'm set for the next day
an0therblizzard | 2 years ago
I am not sure what I said that you are saying "really?" too. What isn't too hard for you?
All that you really did was describe an intermittent fasting schedule.
magenta_mojo | 2 years ago
Replying to you saying it takes some getting used to. I simply described my experience with it, for me it wasn’t too difficult as most of the fasting time is sleeping anyway.
an0therblizzard | 2 years ago
Cool.
And for someone who does not fast at all and eats at regular intervals will probably have a hard time fasting for 14 hours, which represents more than a full day for people.
zangrabar | 2 years ago
I think you misunderstood the timing they mentioned. It’s easier when roughly 7-9 hours that you might be sleeping is half or most of that time. If you stopped eating at 4pm and woke up at 8am,and eat breakfast, that’s a 16 hour fast.
Or if you skip breakfast and stop eating at 8pm and have your first meal at noon, that’s also 16 hours.
It def hard the first few times you do it. But gets easier as you get used to it. I was eventually able to get to 3 days and wasn’t too hard other than work events getting in the way.
Kraken_Kraber | 2 years ago
May I ask what your average energy requirements where/are? My job requires me to be moving constantly and I also work out 3/4 days per week. I can’t see myself only consuming 100-250 calories every 24 hours and expect to be fully functional.
livefreeKB | 2 years ago
Add some salt to you water
Gnarlodious | 2 years ago
Headline says it improves your hunger so at least that makes sense.
aglaophonos | 2 years ago
Intermittent fasting helped me lose 100 pounds. I went from a size 22/24 to a size 4
Zaluiha | 2 years ago
14 hours. Like from dinner at 5:00 - 5:30 and breakfast at 7:30 to 8:00? This is a pretty common occurrence.
sagan999 | 2 years ago
I see you don't do any late night snacking, good for you. Wish it was that easy for me.
use_for_a_name_ | 2 years ago
Or lunch, or second breakfast.
ssp25 | 2 years ago
Bring me the ring
Naphier | 2 years ago
Yeah. I stop eating at 9pm then nothing until noon when I have my fast break. Have done this for years. It didn't significantly change anything. I think most of this is placebo.
SelarDorr | 2 years ago
unpublished, self reported adherence, self reported subjective outcomes.
Zeebuss | 2 years ago
It does align with the findings of previous research on fasting though.
DrDerpberg | 2 years ago
How much of the benefit comes from calorie restriction or more intelligent choices? That's always the hard part when it comes to studies on humans... We do better when you make us think about what we're eating. It's why everything from keto to raw vegan "works" for most people, most of the time.
Does a certain amount of food over 10 hours really have a different effect than the exact same food over 14?
Zeebuss | 2 years ago
>Does a certain amount of food over 10 hours really have a different effect than the exact same food over 14?
Yes, it maximizes time the body spends using stored energy over a constant influx of calories and results in some interesting and potentially very significant health benefits. The effects of intermittent or periodic fasting go beyond just weight loss.
https://www.hopkinsmedicine.org/health/wellness-and-prevention/intermittent-fasting-what-is-it-and-how-does-it-work
ivarsh69 | 2 years ago
Fasting improves hunger 🤯
jadedrealm | 2 years ago
does it include sleep or not
seriousgourmetshit | 2 years ago
Why wouldn't it
zangrabar | 2 years ago
It’s much easier if you do. And doesn’t seem to impact it in a negative way when 8 of the hours are during sleep periods.
saul2015 | 2 years ago
14 is easy, doing 16 now with intermittent fasting
wutchamafuckit | 2 years ago
> For example, if you eat your first bite at 9am, you must eat your last bite by 7pm.
I wonder if this study still holds true for the hours asleep. So if your last bite is at 6:30 PM and first bite is at 8:30 AM would these results still hold?
Illustrious_Bend4982 | 2 years ago
Of course they do that’s how most people fast
whisperwind12 | 2 years ago
Purely anecdotal but I notice that I am hungrier when I eat breakfast than if I had just skipped it. It’s like the act of eating makes me want to eat more. Maybe it’s psychological.
STEVE_THE_JIMMY | 2 years ago
They clearly didn’t test anyone who gets hangry
zangrabar | 2 years ago
Being Hangry is created from the habit of eating 3 meals a day(or just a very strict eating schedule) Breaking habits and consistency can do that to people. New habits can be learned. That also goes to show how important developing strong habits are.
thinkB4WeSpeak | 2 years ago
Of course you're going to get better sleep because you'll be tired from not having calories
--BannedAccount-- | 2 years ago
Bolloxs 14hr fast is not good for you, especially if exercising etc
Zandofkilldof | 2 years ago
And thats why muslims fast for a month
outlier74 | 2 years ago
It improves hunger? No shit!!
Realistic-Dust-3257 | 2 years ago
The amount of people in here asking if this includes sleep is kind of frightening
Cbrt74088 | 2 years ago
So, what are the best times for eating?