Does FASTED Cardio Burn More Fat? (What The Science Says)

Is there any truth to the idea that FASTED cardio burns more FAT?

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I'm 5'5, 177 lbs

[girl_villager]

I'm a kinesiology student (at Queen's University in Ontario!! Fellow Canadian!) and this is exactly what we are currently discussing in my Exercise Physiology class! My prof even mentioned one of the studies you cited here. I may email her your video to see if it can be played in one of our lectures because it really does summarize a good chunk of our current unit. Thanks again for another great science based video :)

[ilyab]

It’s about the stuff your body burns before it uses fat. Glucose and then glycogen get used up first, and after it gets depleted around 45 minutes then it switches to burning fat. With fasting exercise you skip the glucose and glycogen reserves and go to fat burning directly

[chrissamples]

I feel like doing cardio while the body is "hungry" would naturally push it to more quickly elevate all your vitals and allow you to train in that state longer, even if it's a shorter actual training session. As long as your training intensity is there, rather than doing LSD type cardio, that is.

Over time it could increase your VO2 max which increases training capacity, to increase metabolism more drastically.

[newbreed]

I feel better when I do cardio and training fasted.

[felipemartinez]

Glycogen is stored in muscle and liver. When someone is fasted they might have low levels of glycogen in the liver, but still have glycogen stores in the muscle. We use glycogen first over fat as fuel, therefore we use fat after our glycogen stores from our muscles are used up.

[romanunes]

I am a 51 years old woman following You and very happy for your videos, !

[aestheticmuscles]

The purpose of using fasted cardio is only if the person is in a rush to compete and if they have enough muscle mass to spare a little muscle loss, but if the person lacks muscle mass in the beginning then doing fasted cardio is just going to make them small and they will have a hard time putting on muscle.

[rnegoro]

Very well researched, so basically caloric planning is more important than all the fad exercises and diets.

[_MrTV]

You kept saying training but this was specific to cardio. Is there any difference for resistance training not cardio?

[electron]

I can't perform cardio if I've already eaten something prior. If I eat something, I end up getting cramps under my rib cage during my cardio workout.

Also, I can't work out until I get off of work which is at 2:30pm. So by 3pm, the time when I get to the gym, I am so hungry.

But I wait to break my fast until after I finish my workout so that I won't get cramps under my rib cage. Alot of sacrifice just to get rid of unwanted fat. And the hardest part about it is that you feel so alone because no one at work or family is willing to do what you do. No-one.

[khollern]

Calories in vs calories out. Nothing else...Doesn't matter when or how you take in calories. Doesn't matter when you workout. Whatever works for you is right. Run a deficit and you lose fat, run a surplus and you gain fat. Doesn't matter when your body pulls fat for energy, as long as it does. If you put a quarter tank of gas in your car every day, it doesn't matter what time of day you drive, or if you drive before or after you add the gas. If you only burn 1/8 tank, your storing. If you burn a half a tank, your losing.


Time restricted feeding works for me and I exercise fasted, but this only works because it makes it easy for me to control calorie intake without slowing my metabolism.

[malachi]

Cover mitochondrial/fatty acid /glucose sensitivity metabolism under fasted state while working out- I think you will find significant cellular benefits looking at the meta analysis data- as regards to specific fatty acids metabolism in fasted state (not just whether someone is burning more fat or not). The question always being... what is the optimal metabolic state for gaining energy while working out... and much of the research points to the benefits of a fasted state overall. Personally I find my performance in the gym or on the trail enhanced while fasted. Of course I am consuming optimal types of protein within an hour post workout.

[jacobshalvey]

I’d like to know if there was any difference between fasted cardio vs fed cardio with regards to the preservation of muscle while in a caloric defiicit over a substantial period of time. Would one style of cardio induce more muscle breakdown, or would they both elicit the same results?

[bobbun]

That 1976 study sounds like torture. Four hours of continual exercise (thankfully it's only "light cardio"), one group consumes *half a pound* of sugar 90 minutes in.

[jimjam]

Brilliant video. May i suggest some more soft furniture or sound proofing to reduce echo on the audio?

[sampru]

Does anybody notices that during caloric deficit diet body would be still running on glucose and when we are in fasted state body uses fat as a fuel which is everywhere on internet and body isn't in full keto adapted state and that's the reason why people looses fat so gradually because even on deficit diets the body would be still running on sugar.

[minlee]

This man does do his research this is the most scientific bodybuilder I seen

[muhammadraza]

Sir Arnold Schwarzenegger says "Shock the muscles"
our bodies are very smart. May be I will do fasted cardio for 1 week and then shock my body with fed cardio

[shainamarie]

What about fasted in the morning followed by both strength training and cardio in a dieting phase?

[dylanpham]

anyone else notice how the globe moves at 4:30 bc his hand gestures