How to BUILD MUSCLE all day long (most screw this up!) – ATHLEAN-X™

by YouTube Team

Build muscle with ATHLEAN-X by getting every aspect of your training right

Most guys watch youtube videos on how to build muscle, and focus on the right workouts, best exercises and the meal plans to do it. The problem is, even if you get all of these things right, you still can ruin your hard work by messing up the anabolic window you get during sleep.

Sleep is the time during your day that you do the most muscle building. Yes, you do stimulate muscle growth with what you do during your workout, but the actual anabolic process occurs at night when you rest.

As I explain in this video, your natural growth hormone release occurs in peak amounts during your deep REM sleep. Failing to get a restful night’s sleep can sacrifice your ability to enter adequate deep sleep and severely limit your ability to build muscle. Beyond that, proper protein supplementation just before bed can help enormously in the pursuit of building muscle. Having the faster acting whey protein available to take advantage of the initial release of growth hormone and then following it with the slower acting casein protein is key for speeding up the process of building muscle.

In fact, poor pre-sleep nutrition and inadequate sleep are so important to muscle growth and size gains that even the best workout can be undone by not getting this right. That said, the best plan for you to build the most muscle is to sleep 6, 7 and a half, or 9 hours per night while making sure to take a blend of whey and casein protein just before bed.

Get your sleep right and you’ll find that your workouts will become that much more productive (as long as you’re not overtraining) and building muscle size will become easier. For a complete workout and nutrition program that provides you with a plan to get these results without sacrificing your recovery, then check out the ATHLEAN-X program at

For more videos on how to build muscle and burn fat at the same time, be sure to subscribe to our channel here on youtube at

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49 comments

Tee Vu May 20, 2020 - 1:47 am

Great insight. Still relevant today. Thanks Jeff!

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Spider- Dad May 24, 2020 - 1:04 pm

I'm watching this after being awake all night. Awkward

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Lucas Lopes May 24, 2020 - 9:59 pm

Isn't casein extremely inflammatory?

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BD May 26, 2020 - 3:38 am

I guess my gains are in deep shit as it’s 6:38 AM and i’m still awake

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danny o May 28, 2020 - 11:03 am

what happens if you wake up to pee like 2 or 3 times a night at about every 2.5 hours

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That CarGuy May 31, 2020 - 11:44 pm

Looking at the age of this vid its gutting to know i didn't see him sooner! 😧

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Pabs June 2, 2020 - 1:53 pm

Bruh I have trouble sleeping when I want, but thanks anyways

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Stella Doffo June 9, 2020 - 6:34 pm

This is fkn awesome

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Ben Alford June 12, 2020 - 4:44 am

Jeff, Can you get more of a boost if you wake up like every 1.5 to 2 hours and going back to sleep. Get more of that big hump you speak of

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Vito Scaletta June 25, 2020 - 8:50 am

9 hours of sleep? aint nobody got time for that. 7-8 max. arnold said 6 is enough if you just sleep faster.

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amal rosh July 18, 2020 - 2:34 pm

This video has helped me a lot……

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MRZEDDA July 26, 2020 - 5:20 pm

that's a thing that MOST LIKELY you have. Sorry homeless, no GAINZ for ya!

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Cali Jokes July 29, 2020 - 3:21 am

Jeff always have a weird answer lol

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Ammod Sharma July 31, 2020 - 10:51 pm

Me trying so hard working out to gain muscle and watching this now at 4:21AM laying stoned on bed. Noice

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Rohit Yadav August 2, 2020 - 8:56 am

I took that white board to bed.

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Matt September 3, 2020 - 5:57 am

Hi sorry to be ‘that guy’ but deep sleep and rem sleep are not the same thing… deep sleep is stages 1-4 and rem sleep is stage 5. Deep sleep is where GH is highest and there is much more deep sleep in the first 4/5 hours of a sleep, towards the end of the sleep is more REM sleep. Smh…

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Roadside Pedestrian October 11, 2020 - 5:50 pm

6 yrs now jeff❤❤

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Alex PB October 25, 2020 - 2:56 am

always heard 1.5-2.5 hour cycles, but who knows? excited getting back into training again.

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samuricex November 24, 2020 - 3:14 pm

Nice. I’m quitting the gym and sleeping all day long for my gains from now on!

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Adam Jackal November 28, 2020 - 2:52 pm

I’m stopping by to say I’m here 7 years later

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RockaHero XL December 7, 2020 - 1:39 pm

Bruh it’s 1am and I need to wake up 5am 😭

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alphanitz December 10, 2020 - 6:59 am

Its 2020 lol

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dudejrryan December 30, 2020 - 7:16 pm

Just service your Woman & your side-pieces. Burns calories & a helluva lot of fun😂

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Justin Marshall January 8, 2021 - 3:13 pm

All this time I’ve been getting 7 hrs when I should’ve done 7 1/2 hrs thanks bro

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Nick Mildon February 5, 2021 - 12:07 pm

Sounds amazing any chance you can teach my 2 yr old to respect my sleep cycle.

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N S February 16, 2021 - 11:09 pm

U the best

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Sam Elcock February 28, 2021 - 7:44 am

Jeff talks about taking fast release protein pre first sleep cycle, but how long before? I'm assuming an hour as he also suggested not drinking within an hour of going to sleep… 🤔

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Alex Fernandez March 9, 2021 - 7:29 am

Should cover external forces such as light background noises.

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gennaro cirillo March 14, 2021 - 1:58 am

it's 3 am, I should go to work out now with this new technique

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Aarya Gathani March 23, 2021 - 10:41 pm

Just mix whey in milk before sleeping. Fast protien from whey and slow milk

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IF Nutrition April 11, 2021 - 5:23 pm

Sleep is key so many people screw this up and sabotage their gains!

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Manu 27 April 18, 2021 - 9:14 pm

and you know guys you have to sleep until failure

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Sky Cloud April 26, 2021 - 8:15 pm

For those that have Fitbits, I've noticed that I can set a alarm that can wake me up half an hour before my alarm clock if I'm already out of a deep sleep cycle I think.

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Daniel Gonzalez May 7, 2021 - 6:51 am

Lmao fuck man, i workout so that i can mainstain a shitty sleep schedule and drink a lot. like right now as i watch this, sipping some tequila right after the gym tonight, oh well lol

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Nick Koul May 13, 2021 - 3:53 pm

It’s 2021 and I found this gem

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Mahmoud Ezz May 18, 2021 - 11:52 am

I'm eight years too late headass, but whats that outro song?

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Chungwon Yoon May 20, 2021 - 9:37 pm

Awesome!!!! This is gonna change my life!!!!
Thank you!!!!

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TINDARO LEONE May 21, 2021 - 9:13 am

Jeff Cavaliere. Time passes but your soul remains young and pure your body your stainless structure great wisdom 💝💝🙏💯

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Ji Mo June 3, 2021 - 12:20 am

I understood it by chance while eating two eggs before sleep for a couple of days instead of eating them in the morning as I didn't really feel into eating anything but my protien shake in the morning and I felt full. Then I noticed firm muscles in a couple of days! Though I have been training for two years but whenever I am stressed muscles melt like a piece of butter on fire as if I am not doing anything. The turning point was when I started eating eggs or drinking shake again before bed. I saw the difference and started digging science to make sure what's happening! So Now by experience and scientifically based protien is magic if you take it before bed!

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Scaarub xD June 11, 2021 - 10:44 pm

this guy is goku irl

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Bona Fide July 17, 2021 - 7:50 pm

Thank you for this info ✊🏻

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danedm August 4, 2021 - 2:32 am

Athlean-x, if I know that going to bed earlier makes me feel much better than going to bed late at night, is there an "early time" that you recommend for those who know they feel more fresh and fit when getting to sleep early? Any reply, I'd be grateful. Keep up the great work! God bless

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PY K August 8, 2021 - 12:15 pm

Ahh so this was how Jeff looked liked

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Robert Lahman August 19, 2021 - 8:14 pm

Old school Athlean-X

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angel morales September 2, 2021 - 8:47 pm

Thank You for taking the time to help explain this valuable information! Thank You!

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Dodge Man September 6, 2021 - 11:29 pm

I tried reconstrucxion (the night time recovery supplement) for the first time last night. I was dead tired yesterday man I thought I was gonna get up sore and tired as hell. I set my alarm for 7 hrs of sleep but I got up without the alarm after 6 hrs of sleep. I do have soreness but it's nothing I can't handle. I don't feel fatigued. Usually if I trained and worked like yesterday, I would've been feeling like shit by now. I know this. 100%. This was my first time. I'll keep commenting after further use for other viewers' experience.

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Viral Headquarters September 23, 2021 - 1:00 pm

Put the captions on, pause at 17 seconds, and read what Jeff is a pro at.

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Alex Pastel October 3, 2021 - 3:21 pm

He talks about his Reconstruxion RX-3 supplement as a great pre-sleep supplement because of the whey and casein content. But RX-3 doesn't have any protein in it! Did it used to?

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Yaaseen Abrahams October 13, 2021 - 2:43 pm

yup…1 and a half hours per cycle is exactly correct and timing your sleep hours accordingly in that cycle is absolutely optimum. 7.5 hours in my opinion is the sweet spot

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