Fat Burning “Bro-Science” (SWEAT MORE | BURN MORE!) – ATHLEAN-X™

by YouTube Team

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Have you ever wondered if sweating more during your workouts burns more fat. In this video, I’m going to explain whether trying to get your sweat on is actually increasing the amount of body fat you are burning in your workouts or just burning you out and hurting your overall workout quality.

To start, it is important to differentiate between losing weight and losing body fat. When you lose weight, it is very possible that none of the loss came from a true loss in adipose tissue. In fact, it is not uncommon for someone to lose even ten pounds in a single workout. That said, this is all water loss through sweating. If you rehydrate properly, you should put back on this weight within hours of finishing your workout.

In fact, your body is built for survival. If it senses a dramatic loss in water through a monitoring of blood volume then it can trigger your thirst mechanism. The need to drink is our body’s way of helping us to replace lost fluids and get back to an environment in which we can thrive. For those of us trying to not just burn body fat but also build muscle, it stands to reason that you will never want to be dehydrated.

Now, when people are looking to burn fat faster in their workouts they may wear heavy workout gear like a sweat suit or a rubber suit. The thought is, this will make them sweat much more and will accelerate the fat burning process. This is not correct at all. In fact, it could actually be defeating the purpose by accelerating your path to dehydration and therefore impacting the quality of your workout leading to fewer calories burned.

When your core body temperature is elevated, your body releases water through the pores of your skin that eventually evaporate and help to cool you off and bring your body temp back down closer to your normal. Physical activity is not a prerequisite for this to occur. I could be standing in the middle of the Sahara desert and start sweating profusely. No physical activity is being done and therefore my caloric expenditure is greatly minimized.

On the other hand, I could be doing a gut busting conditioning workout that includes burpees, box jumps, jump rope, etc in the middle of the frozen tundra in negative degree temperatures and not break a sweat. The reason is simply that the outside temps are so cold that even with all the physical activity I am not able to increase my core body temperature at all to necessitate a sweat. That doesn’t negate the fact that I’m working really hard and burning calories.

At the end of the day, the only thing that matters when it comes to fat loss is that your body is being placed in a hypocaloric state quite often and consistently. This means that you are burning more calories than you are taking in. This is why fat burning workouts are not actually necessary to be lean and ripped. If you managed to decrease your calories through diet alone you could wind up getting very lean without every having to do specific conditioning workouts.

That said, we tend to opt for the fat burning workouts and in doing so need to throw out the sweat factor and focus most on the intensity of the training. Now one last point that should be made. Likely if you are doing harder exercises with more effort for a longer period of time you will sweat more than if you did easy exercises at an easy pace for shorter. The first scenario is likely going to be able to raise your core temp more and increase your sweating. That could lead to the confusion of sweating equating to fat loss. Don’t be confused. It is just a byproduct of the high intensity and caloric burn.

If you are looking for a program that helps you to burn fat fast by mixing in the right type of conditioning with a fat loss meal plan and strength training workouts, head to and get the ATHLEAN-X Training System. If you want to be ripped like an athlete you need to start training and eating like one.

For more fat burning workouts and advice on the best way to lose 5 pounds of fat, be sure to subscribe to our channel here on youtube at

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26 comments

ATHLEAN-X™ December 20, 2018 - 9:59 pm

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Dhananjay V Jahagirdar November 12, 2020 - 5:49 pm

Jesse PINKman

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Mujtuba Hasan November 15, 2020 - 8:41 pm

The world owes you big time for this video

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c88.rex November 15, 2020 - 9:49 pm

Jesse is such a good friend

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Ariana Costa November 22, 2020 - 6:11 am

you answer almost every questions thats on my mind

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Matias Fernandez December 11, 2020 - 11:22 pm

I love how well you explained every single videos that you make that includes this one. I do have a question for you that I want you to answer for me to see if the person that told me this is correct… I have a friend, shes a college soccer player. I asked her how come she burns a lot of calories in like an hour session. In one hour session she can easily burn one thousand calories. And I do a lot of hiit trainings which includes my goalkeeper high intensity workouts. And I only burn up to 700 calories in a training session. I am using an app called map my run to calculate. She is using her apple watch. She told me that calories are calculated depending on the persons heart rate. and the map my run cannot calculate my heart rate exactly to calculate the calories loss. She also told me that I should not focus to much about how much calories I am loosing during a workout, but focus on having an excellent workout and feel that I put in the work rather than the calories burned. What do you think about what she told me?

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LUX PRODUCTIONS December 21, 2020 - 6:47 pm

NICE SUIT JESSE

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Chris Therriault December 30, 2020 - 8:09 pm

You look great in the suit bud haha.

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JJpooh 7083 January 2, 2021 - 12:09 am

Jesse packing 😳

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Jorge Fontan February 21, 2021 - 12:28 pm

Serious question. Does Jessie buy all these outfits for the videos or does he have these hanging in his closet?

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Shadley Bam February 23, 2021 - 10:10 am

Listening to Jeff swear is the best

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Craig Collins March 5, 2021 - 7:48 am

A good double act you two!

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omar tabyaoui March 8, 2021 - 4:30 pm

As a pharmacist I have this to say:
Increasing your body temperature stimulates a part of your nervous systeme called the sympatique nervous system, the stimulqtion of this pqrt happens when the body is exposed to physical and or emotional stress, including as mentionned high temperature, this is the part of your nervous system that activate the release of adrenaline and neuradrenaline, wich are direct stimulus to the process of lipolisis aka the decompoaition of triglycerides in the adipose tissue and release of fatty acids, as well as stimulating the neuromuscular junction of some internal organs that are necessary to the functionning of the body, more notably the constriction of blood vessels that connect to non essential organs in that situation like the stomach and bile and intestines, as well as dilate the blood vessels of essential ones like the heart lungs and liver.
From all this I modestly disagree with this video and hope you do more research on the subject and correct me if I'm wrong.
So in general: high heat=>more adrenaline and neradrenaline, more lipolisis, more activation of essential organs that help the activity of the muscles, more burning calories in general.
Sweating is just a byeffwct of the process, as well as the increase of thirst.
Hope it helped.

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José Pablo Bolaños Rigioni March 10, 2021 - 7:16 pm

Too Much Sweat is Killing Your Gains…

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Spectacular Spider-man May 15, 2021 - 10:27 am Reply
kkk May 18, 2021 - 4:32 am

Jesse is heading to hollywood soon

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The mad lad May 23, 2021 - 6:40 pm

ya but Jeff has never been fat

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kenny omega May 31, 2021 - 8:09 am

use aerobic stepper for 30 minutes with saunasuit

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kenny omega May 31, 2021 - 8:10 am

SAUNASUIT HELPED ME LOSE WEIGHT,NOT JUST WATER.TURNS BODY TO A FATBURNING FURNACE

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Abhi June 21, 2021 - 9:26 am

He looks like a macaron! 🤣

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Toni H June 26, 2021 - 6:27 am

Could you please talk about why some ppl sweat more than others, even if they're not necessarily heavy or even if they have low fat percentage? I'm that person, hence asking…🤔
Thank you for your interesting content 🙏
Y'all hilarious! Jesse looks hot in a suit 😍 just sayin🤷‍♀️

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Ryan Fernandes July 5, 2021 - 7:31 pm

Jesse you Rock bro 🤜

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Burning Flag July 30, 2021 - 8:03 pm

Thanks, was shopping for a new weighted vest when i saw sauna suits. Just couldn't see what the benefit was. I'm sweating enough each night working out in 70 degree temperatures

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Yourmom ez November 7, 2021 - 9:40 am

4:50 look the cut in this scene , Jeff still talk normally. So he just opens his mouth pretending to talk and after the video he puts his voice that he recorded yesterday or something???

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MysticBlack December 13, 2021 - 1:25 am

I think getting hotter during your workout can make it a more effective workout tho. Its proven to raise your heart rate more than being cooler.

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Pdotta1 December 29, 2021 - 1:46 am

Good jumping even in that suit

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