Exercising during fasting

[@Mimiscellaneous]

Just from personal experience - avoid intense exercise (including lifting heavy weights) particularly when you’re new to fasting. Walking, possibly a light jog, stretching/yoga, body weight/light weights. Anything more is a great way to feel like shit; and possibly dangerous for some people.

[@magnanorth4713]

Thank you!

[@jonesmorales-tu6kq]

Yoga is Hindu God worship no thanks

[@violet_myblueheart]

I agree. Your body also undergoes stress when you are fasting so you must not add heavy strains.

[@Eritreanlěêleti]

I run 6 miles daily and fasted once, should I continue?

[@Mimiscellaneous]

@@Eritreanlěêleti Did you run when you fasted before?

[@Prodigious1One]

Yes, exercise during fasting strengthens muscles and tightens skin.

[@kevinthompson2753]

Agreed, it took me 6 months to get to this stage but my endurance and recovery during fasting is on another level. It’s like using a “enhanced” fuel.

[@kitchencarvings4621]

I like to go on a 10-20 mile bike ride while I'm fasting. It helps to burn up all the glycogen quickly so I get into ketosis faster and benefit more.

[@bonniesessley2252]

Wow

[@dogood3133]

I do the same

[@kitchencarvings4621]

@@dogood3133 I like knowing that most of the calories are coming from fat, which I have some still. I also will ride to use up all my glycogen. Do you have the same feeling of being able to ride forever without bonking?

[@scwkmajor]

I lift heavy… no problem for me! ❤ AND I FEEL GREAT. I have fat on me… so that’s the point of Dr Fungs message. I will say, I’m getting tighter & seeing GREAT RESULTS!!!

[@borisfitnessdad4733]

The best advice by far

[@andrewbeast9]

seriously

[@Yong_Goh]

Once you’ve fasted long enough and in ketosis, the energy level feels “steady” rather than a “sudden large” amount. I prefer longer activity rather than exercise that requires intense bursts of energy.

[@terrytaz8914]

I think of people back 150 or so years ago. They surely consumed way less food and worked way way harder. They were just fine

[@MaxKohanzad]

It's really depends. How much glycogen you have in your muscles from the previous feed. It depends how well your body is able to become fat adapted, to start using ketones as a fuel source. It depends on how low your calorie intake over the week is. It depends on electrolytes, sleep, stress and dehydration.

[@bonniesessley2252]

Excellent answer. Plenty variables

[@FavoredE]

This is the BEST break down!

[@bambino2068]

Best advice 👌🏽 👏 💯

[@nothanks1673]

I'm currently attempting to lose fat with fasting but build muscle with lifting at the same time. Just started, so feel like a complete noodle, but I've never felt any different levels of energy (fasting or not). Biggest thing with me is motivation, always motivation. Appreciate the straightforwardness of Dr. Jason Fung; it's inspiring.

[@shellyedwards7526]

I always run fasted. No problems for me.

[@Boulos-cb2un]

So after a 5 day fast you push out a 12km run?

[@shay_3859]

⁠@@Boulos-cb2un2 days ago, I fasted for 28 hours or so, woke up and went running. I beat my previous personal best distance. An Empty or semi-empty stomach leads to peak muscle activation in your core especially. Contracting muscles and breathing is sooo much easier when fasting for a long time.

[@ericauto8645]

I fast while exercising every now and then. Though to lift heavy weights, I found that a solid meal prior to exercising is a must.

[@johnnysanchez4456]

Excellent information

[@Creepy_crawling]

Just to add to this. Remember to drink your electrolytes. Pretty much anything with no carbs or sugar will keep you fasted. Supplements, multivitamins and all that that. Most importantly don't forget your sodium. If you can buy electrolytes with sodium just drink some sea salt.

[@fightclub50000]

Don’t take any vitamins made by any company

[@Creepy_crawling]

@fightclub50000 that's why we go to a registered dietitian to guide us through the process. That way we lose fat not just water.

[@THEMATRIXCORP]

Thank you for the tip !!

[@giovana4121]

But if you don't exercise regularly and want to start, it's better to wait for the feeding period to do it. Note that he says to exercise IF hou normally do it.

[@paulineking3767]

Is this Jason fung?

[@danielstoffberg9115]

Indeed it is😊

[@monicafrancNiki]

I can not exercise when I do prolonged fast. I don' t drink elektrolytes because I can not find one w/o sugar here on the island. So when I do prolonged fast 3 to 7 days, I can not exercise. I drink water with pink salt, never had a headache or cramps. Only years ago when I did fast for the 1st time. I hope to be able to order some good elektrolytes online someday. When I do intermitted fasting I can exercise. When I do omad, also. No problem

[@TarpeianRock]

I’m a Fung fan and do IF regularly, however…I’ve had this happen two times to me playing padel while fasted and that did NOT got well for me : the second time I had to stop playing after 30min and had to lie down feet up to keep from fainting….Never again. I’m always eating some healthy carbohydrates before exercising.

[@danielstoffberg9115]

Interesting, I had the same thing!! I started eating keto and carnivore on my non fasting days…it helped. I figured it meant that I had no drop in sugar as my body stayed in a fat burning state 24/7 and never had to change between the two…which likely caused the dizzy spells during crazy HIIT workouts. Would love to hear someone like Dr Fung or Dr Chaffee’s opinion on my theory though😋 Coz I can now burn 2500 calories in 2 hours of HIIT exercise, before I would redline at 500-700calories in an hour.

[@diksoeybowisani422]

Fasted workout is a great sugars Burner

[@dinapawlow1622]

❤ thanks for this information .

[@Bts24-M]

And should I eat after workout or i can continue fasting?

[@3rinityivysage292]

I’ve always been told to rest during fasting as it can be dangerous to use up all your energy? I heard of a girl who passed away in the gym because she was doing a cleanse and working out in her fasting week…….so much different advice. I must say though, I have great workouts when I go to the gym on an empty stomach.

[@kebsriad]

I am living on intermittent fasting because iam diabetic, I run and workout 5 day a week, feel great . Don’t workout the first day you try fasting, wait three or four days, until your body get used to that , because the first days you’ll feel a little tired

[@igorigor1496]

You are correct. Everyone is different. You need to listen to your body. If you trying to loose weight then bee active and go training but if you want to heal do less as possible to let your body use this energy to heal not to lift weight. If you have clean body and dont have toxins much then you will have lot of energy and will be like he said but if you have toxic body like me you will not have too much energy. You need save energy...

[@3rinityivysage292]

@ 💯% agree with you

[@sherrischwartz6844]

Yes, great content.

[@imaqtpa2t]

Been on keto on and off 12 years down 159 lbs. Still trying to get off last 20lbs. Can someone give me some advise on burnt butter. 4 ingredients butter vanilla pecans kosher salt. Please advise is this a good snack? Will it kick you off of ketosis?

[@LiberationSeeker101]

Do you have a ketone meter (KetoMojo, etc.)? Best way to see if you're still in ketosis or not. 😉✌️

[@Boulos-cb2un]

Go to the gym and actually start training

[@giovannarosa7062]

This is true, I trained while fasting, it helps with energy levels and I don't get stomach cramps. Plus my mind is clearer. I keep my foods boring and clean. It saved me from cancer and it helps with my Hashimoto's. But people keep thinking what I'm doing is dangerous and stupid. But I've been doing this for five years. Although, if you overfast, you'll need to make sure to take vitamins to ensure you don't suffer malnutrition. My body can't absorb some foods, do I take it in liquid sometimes

[@jarednarine8773]

ok, but can you do heavy weight lifting during the days that you fast? definite difference between general excercise and deadlifting 300lb... that being said I hope there's an explanaintion

[@MH-bw9zt]

Idk about heavy but you should definitely do some weight lifting as it prevents muscle loss.

[@danielstoffberg9115]

Just my personal experience: I found that doing CF type weight lifting hot easier for me on fasting days when I started doing carnivore on non fasting days. But I reckon that was because I now stayed in a fat burning state, so power was constant (no carb sugar dips) and my protein was high, do recovery was pretty quick. Not sure if thats the science behind it, but just what helped for me. (Before my lifting was weak and recovery took forever)

[@jarednarine8773]

@@danielstoffberg9115 bless brother, thank you!

[@jarednarine8773]

@@MH-bw9zt good to know, thank you very much, I just did my first fast ever. Just a 24 hour fast. I ended up lifting within a 10-12 rep range. So more medium weight

[@akalamusa4443]

During fasting time can I take Fruits that is high in Fibre as you said that I need foods full of fibres

[@LiberationSeeker101]

If you did that, then you wouldn't be fasting. Fruits also have sugar, you know. 🤔

[@reynarbarte7743]

True👍

[@dollysen644]

I have zero energy while fasting feel very weak dizziness too

[@Tsukino1011]

Drink electrolytes and more salt, you’re lacking in those areas if you’re not eating or eating once a day you shouldn’t feel that way at all. If you’re doing water only you’re definitely deficient in what I said earlier. Trust me there’s 0 calorie powder with all the vitamins you need just have to look for which one you like or taste.

[@dollysen644]

@Tsukino1011 Thanks so much for your help Ure right I am deficient and I need vitamins . I just eat once a day that too very less as now I dont feel hungry at all I force myself to eat and I think thats not enough for my body . I drink liquids alot and Ive shed alot of weight in just 2 months then again im not healthy at all . I'll take your advice :) Thanks alot once again . Ure too kind . God bless you !!!

[@igorigor1496]

Its because you have too much toxins in your body. Thats why. Dont force it. Go slowly. For me was same. I could not do 12h know i do even dry fasting.... But still I have lot of toxins in my body. Its long process. But every time you clean more and more... I would recommend try juice fasting to learn to listen to your body. You will see what adiction you have... It may be sugar, coffee or cigarettes or something else.... You will recognise what is addiction talking or your body is telling you. After that your water fasting will be better....

[@igorigor1496]

Cleaner your body less tired you will get... Good luck...

[@igorigor1496]

Also remember you fast every night when you go to sleep. Name Breakfast is from Break your fast. Its mean you fast every night. Its mean you can use your sleep for fasting... Find your best fit how you like. You can push your dinner or breakfast a little bit and + sleeping you can to 12h. When you are ok with 12h push to 18h then 24h then 36h then 48h,60,72... Good luck

[@33MattyIce__]

I'm a recent carnivore convert -about 3 months. Just closed out my 36 hour fast with a killer shoulder, bi, tri, calf circuit workout at the gym! One of my best workouts ever (don't have a ketone tester, but I'm sure they was flowing and ketoning!!💪🏽). Yesterday (day one of fast) I did my normal chest routine at the gym too which was excellent! ... This was my longest fast. I was gonna go 72 hrs minimum, but then I remembered I had beef thawed in the fridge already and didn't want to refreeze... Figured since this was my first 24hr+ fast, it was good enough. Ill be scheduling in the 72hr fast in the near future, and plan ahead with nothing thawed out initially! Should probably mention I still had my cup of black coffee before the gym. Also today I pounded down a LMNT electrolyte drink pre workout as well. LFG 🥩

[@CancelledExplorer]

Convert? Bro thinks this is religion

[@brianabeans4549]

I dont know, i want to fast but i also want to work out. I feel weak when i fast.

[@CandidlyCat]

​@@CancelledExplorerThat's one of the dumbest comments I've ever read. You can convert to anything, not just religion.

[@CancelledExplorer]

@@brianabeans4549 bout to convert to fasting 😏today but with broth soup and supplements if needed , Himalayan salt is good too

[@cacielynncrawford6362]

What about dehydration from only drinking water

[@PsychoFisho]

Endurolyte uses ginger powder to reduce upset stomach from ingesting salt on an empty stomach. Pink salt works good too. Teaspoon stirred into warm water, morning and night. Dehydration is from lack of salt, salt imbalance. You will pee out any excess. You can even smell it.

[@hermanharper4594]

Take it easy light walking and stretching fasting days. Knowledge is key. Some say ok some say no. Put it to the test.

[@captaincurd2681]

My faat guru.

[@andyluis13]

Would one lose muscle or not build muscle in a prolonged fast?

[@Realogn]

I imagine your losing muscle either way but with protein it’ll be repaired either the same or stronger

[@ronniedavis1873]

This guy is awesome…..👍🏽

[@BambinoFilipino1]

I argue that for aerobics this can be done, but for strength training you need carbs. I’m just speaking anecdotally. My strength drops off I don’t have carbs before a strength training day.

[@renaerolley5670]

It would behoove me to do my job in a fasted state? I pick groceries at Wal-Mart. I'm on my feet for 7.5 hours a day. I have a four day stretch next week.

[@monicafrancNiki]

I believe that dr. Fung means intermitted fasting not prolonged fasting right?

[@Part_Time_Ox]

He talks about prolonged fast alot, prolonged is usally anything over 24 hours.. like 3 days.

[@denisaking9151]

I do exercise on my 3 days fast. 1st day I lift heavy plus my normal activities like walking the dog , going to work etc . 2nd day its hardest for me and i only walk plus my other normal activities, 3rd its the easiest and feel like I can do anything 💪 but i do suffer feeling really cold in my 3rd day doesn’t matter how much I move and exercise.

[@annefitz7346]

I thought I need to eat something before exercising so I wouldn’t get lightheaded. I’ve adjusted to not eating over the last few weeks & now I don’t notice any side effects

[@bravo1821]

Absolutely

[@TheStranger0509]

My blood glucose rise when i train in fasted state, is that normal?

[@OscarGarcia-iu1tv]

Yes that’s normal. Thats glucose from fat storage

[@makisp.1428]

Sound bites are dangerous. Fasting before fat adapted or after. What type of exercise? anaerobic, anaeobic, lifting?

[@SpikeFastRacing]

Do you even know what fat adapted even means? I doubt it

[@Zabyra]

@@SpikeFastRacingi get intense dehydrated if my body isnt long enough in ketosis and i do exercise

[@SpikeFastRacing]

@@Zabyra that didn’t answer my question

[@Zabyra]

@@SpikeFastRacing u do exercises during fast i can’t already run just a small amount and i get dizziness

[@SpikeFastRacing]

@@Zabyra stop responding - you’re make no sense - go back to grammar school

[@SheldonGrunwald]

The guy in “the naked prey” ran a marathon while fasting

[@baswkou726]

And can you lift weights when your fast begins and then you won't eat for 16 hours? Is it ok?

[@jose_villagomez]

depends, id say try 8 hours first

[@jeremywheeler2122]

When you exercise while fasting, you get into ketosis faster. When you're overweight, think of yourself as a warp core that is about to overload. Sorry for this Star Trek reference. You got to disperse that excess energy.

[@aresvonmars9708]

I always train fasted and I go hard.

[@howardryburn9646]

I'm doing many things including hanging Xmas lights while I'm on my 72 hour fast . Autophagy while making spirits bright 🎉

[@ws3046]

What about if you're hypoglycemic? Should I even be fasting?

[@debstayblessed9549]

Doctor supervision is suggested. Stay blessed.

[@igorigor1496]

You already fasting every night when you go to sleep. Name Breakfast is from Break your fast. Its mean you already doing it. If you sleep 8h push breakfast or diner little bit more.. Start to get total fasting to 12h then when you feel ok with 12h next time go little bit more... First you need to learn to listen to your body. You need to understand what your body is saying when to stop and what its saying. I would recommend first try with juice fasting... With that you will learn to listen to your body. You will learn if you have any sugar or coffee or cigarettes or some other addiction ... You will lear how thats feels. Then when you will go to water fasting you will recognise if its some adiction whats talking to you or your body is saying something.... P. S If you go with juice fasting remember if you will use some sugary fruit then see how you feel. If you get similar feeling like from energy drink. Quick energy but soon after you feel tired. then you should diluded your juice with water to 50:50 or 75:35... Find your sweet spot were you have your energy steady all day without crashing. If you dont diluded your sugary fruit juice with water you may get insulin spike and thats why you get ups and down... Good luck!!! To ease your mind buy glucose meter for diabetic people. Thats why you will be able to calm your mind if you feel strange... Dont drink too quick water.Dont force it. Drink slowly that way you will not flush your electrolytes and you will not need supplement them. But its ok if you flush to quick and start feeling dizzy just put lit bit himalay salt in your water to get electrolytes back in norm... Just listen to your body dont force it. Remember better to stop fasting when you feel great. That way you will fast again if you force it you will not like fasting so much and you will do less... Start slowly start with 12h then when you feel great next time go for 18h,24h,36h,42h,48,60,72h... Good luck

[@bernadinecabanas331]

I fast for 48 h…I don’t change my daily habits. Yes you can do sports and work-out.😊

[@Origin_Sphere]

if you are doing extended fasts (2+ days) you definitely shouldn't lift weights to failure and break down your muscle because you aren't consuming any protein to build it back up. do some calisthenics, pushups, squats, situps, etc. but not to the point of failure or you will be hurting. this will signal body to preserve muscle mass.

[@RosarioPadayao]

What about the malnourished one

[@kimhornhem5399]

Malnourished person should be eating. If they can't eat big meals, then they should eat small meals more frequently. Paired with light exercise to help with digestion, should be no problem.

[@jadler10]

Nope nope, when fasting best to take it easy. In the fasting state fat will be burned resting. If you exercise while fasting you won’t burn more fast but you will waste away more muscle than if you chill.

[@RosarioPadayao]

Thats what happened to me

[@RosarioPadayao]

Thats what happened to me

[@Part_Time_Ox]

thats not true at all.. its been proven.

[@Macgee826]

Why would our super human body burn muscle instead of its fat stores?

[@taishankm]

❤❤❤

[@jaskeda]

Personally if i walk is ok but if i run i got to break my fast right after

[@MKay-u7z]

In cycling when you run out of fuel they call it "bonking". At a minimum, it would be unpleasant to do a long run or ride in a fasted state UNLESS you have gone through the process of becoming fat adapted.

[@santipetronas]

I will refer to myself as "very energetic" instead of overweight lol

[@user-chrisgou]

Although I agree with many of the things that the doctor says.Exercise and movement is different. Movement is ok but if someone do hard exercise with fasting it will be difficult to the body to recover after working out.. especially with 24 or 72 hours of fasting. You need protein to recover I don't know if ketones do that work but this is don't feel right to me.

[@defibeast]

Hard exercise is amazing your body is forced to make more growth hormone

[@blackrhinotattoos]

Do you believe this on an extended fast? Say 21 day fast?

[@johnstewart4350]

THE WEAKNESS IS ABNORMAL IN FASTING... AM I ALONE WITH THIS FACT? ... WHAT ENERGY... ???

[@theenlightenedapproach5162]

Not on long fasts though

[@johnshepard7630]

Completely disagree with everything. My normal excercise routine doing weights and going for 3 mile runs was not possible. Felt sick and light headed. more so as I kept getting near 7 days. If we are referring to intermitent fasting, sure you are going to eat later. If you are doing fasting, days or a week at the time, do not.

[@TNTroXxor]

Yes you can, BUT, it will impact your gains IF that is what you're after.

[@PfukYT]

The more exercise you do the faster you'll deplete glycogen stores which in turn will get you into ketosis faster

[@JR-sb6mj]

Jujubee 😄

[@PsychoFisho]

Advice on post-exercise fasting from someone who neither exercises, fasts, or studies exercise nutrition. His oversimplification is not only not helpful, but counter productive. The point of focused exercise is to tear down muscle in a controlled manner, and feed it branched chained and "indispensable" amino acids (no longer called essential amino acids) as you have long deep sleep. Your body can make glucose, but it can't make indispensable amino acids (by definition of "indispensable"). 1gram protein per Kg of body weight, per strength/cardio day. After meaningful exercise your body craves protein to build back better. Fasting for more than half a day after exercise is just depriving your sore muscles and your tired cardio system of the nutrients it needs to benefit from the exercise. In fact, the 45min window of time immediately after exercise is most important for amino uptake.

[@deenibeeniable]

Probably good to give your body a signal to spare muscle tissue.

[@tornquad5024]

Wouldn't eating one meal a day only in the morning work better as your body is following the circadian rhythm and you go to bed feeling little hungry thus allowing your body to produce more growth hormone during sleep.

[@theglowingcommunity]

How about when breastfeeding?

[@l9ino170]

You can still feed and excercise, the milk doesn't have much calories

[@forbesgrl5707]

I didn’t have much milk if i didn’t eat … how do you keep your milk supply? Maybe you already pumped and stored?

[@Bomber411]

I don't think you're supposed to fast aat all when you're breastfeeding, but I could be wrong on that.

[@Bools46and2]

Starting to think this guy is a quack.

[@moulin680]

Fast for five days this week play racquetball twice even though my fourth day and I was on fire killing it feeling great

[@aahlilweever816]

One of life biggest conundrum. People With the most fat have the most energy 🤔

[@jrm8206]

Yes, its great but let your body get used to fasting first! I would say only start doing it after 6 months of fasting daily (16h). Otherwise you might get lightheaded and all the not so fun stuff. After your body is used to fasting working out during is great. You are a fat burning machine and will be able to stay ripped year around.

[@daz3745]

And I won't collapse?

[@TreXsJournal-Coming-Soon]

Your body sufficates from a lack of ability to MOBILIZE that fat, because it's use to having nutrition come in too often. So, yes, it starts as being the same is if your body is suffering from a lack of energy, cause it is.

[@biggreasygaming4898]

You gotta eat big to get big

[@PsychoFisho]

These people (1week, 2 week fasters) confuse losing excess fat rapidly with gaining a strong fit body. Priorities. People on The Biggest Loser (sponsored by Planet Fitness) lose fat, gain muscle, and eat properly 3x daily.

[@igorigor1496]

I would say its dependant what your goal is. If you want to loose kg faster yes exercise,but if you want to heal do less as possible... And its dependant how much toxins you have. If you have a lot then you dont have much energy...Your body trying to deal with toxins. Always listen to your body.

[@miloice74]

Right, you need protein to build and recover. So, where does the protein come from if you are doing a prolong fast and you try to do the same exercises as you used to.😂

[@joelm4847]

that’s why you eat protein the days after and the night after workout there’s no fast police that you have to fast everyday

[@miloice74]

@@joelm4847 there is no police that anyone needs to fast for the matter. So many bs claims on fasting

[@appleofelohimseyes7774]

​@miloice74 no it's not bs. I was going back and forth to the hospital. Having irregular heart beats, anxiety attacks, pounding heart waking me from my sleep. I couldn't even walk around the block and yet they declared me healthy. I asked God to help me. An eight day fast came to mind. By day two, my heartbeat regulated. The four, my belly was much flatter, and the anxiety attacks went away. Once I was done, I was able to do small workouts and even walk around the block. Mind you I was only 180 lbs.

[@RulaOfMe]

You know nothing about anatomy or biome or nutrition you just heard you needed protein at 10 years old and been regurgitating it every since well news flash protein is amino acids and amino acids come from the stored fat and cells in your own body when you fast thats why you produce higher hgh when fasting as oppose to stuffing your body with dead carcasses thinking that you’re healthy animals get their protein from plants protein doesn’t just grow in their body protein comes from plants, sir amino acids

[@null_spacex]

@@miloice74do what bs works for you and calm down kid

[@RonWesterbeek]

Moderation is worth considering for normal active people. Just saying. ✌

[@Aerandir09]

This seems counter top most of the scientific literature out there and basic physiology. Are these statements just conjecture?

[@Raven-ug8uw]

Find another voice.