Neck Flex video reviews and viewer comments
Independent YouTube reviews of the Neck Flex going back to 2014, and what the people in the comments said underneath them — verbatim, with a link to every source video.
9.7M
views on YouTube videos that review or feature the Neck Flex
Across 15 videos from 8 independent channels, 2012 to 2025. View counts read 15 August 2026.
What do YouTube reviewers say about the Neck Flex?
Thirteen independent videos have reviewed or demonstrated the Neck Flex, from a chiropractor's three-part clinical review to a head-to-head against the Iron Neck Pro. Together they have been watched nearly a million times, and none of the channels is owned by Neck Flex.
Best Neck Harnesses for Maximum Strength Gains
The Strength Classroom · 5 Sep 2024
The Secret to Building a 25" Neck Part 2
fatlosspro (Jason “Shark” McGuckian) · 28 Feb 2014
Bigger Neck Without Free Weights? Try This
The Strength Classroom · 4 Dec 2019
Neck Flex review by ratethisgear
RATETHISGEAR · 3 Feb 2017
The Neck Flex - Training Equipment Review
Nick Nilsson – the Mad Scientist of Muscle · 26 Apr 2014
I Tried Every Piece of Neck Equipment (SO YOU DON'T HAVE TO)
The Strength Classroom · 19 Sep 2025
Neck Flex Revolver VS. Iron Neck Pro
1st508th Airborne · 24 Nov 2023
NECK FLEX Head Harness For Neck Strengthening Product Review
Synergy Wellness — Dr. David Kulla · 15 Apr 2025
Which Neck Equipment Is Actually Worth Buying? (Full Test)
The Strength Classroom · 26 Dec 2025
Neck Flex Review - The Secret to Building a Bigger Neck
1st508th Airborne · 17 Oct 2021
Dr. Allan Bacon · 19 Jun 2019
Neck Flex MMB Pro vs Neck Flex Ballistic
Synergy Wellness — Dr. David Kulla · 20 Apr 2025
Neck Flex Ballistic | Neck Strengthening Harness
Synergy Wellness — Dr. David Kulla · 22 Apr 2025
The two Jeff Nippard videos
Jeff Nippard, whose channel has 8.5 million subscribers, has promoted the Neck Flex in two videos totalling 8.8 million views — and the discount code in those descriptions still works.
How To Build A Thicker Neck Fast!
Jeff Nippard · 23 Apr 2019
How to Grow a Huge Neck and Traps | Science Explained
Jeff Nippard · 21 Jun 2017
This is a paid partnership rather than an independent review, and we say so plainly. It is on this page because it is a matter of public record and because the scale is part of the story: those two videos alone have been seen more times than most fitness products are seen in a lifetime.
Buyers who switched from a competitor
Seven commenters describe returning or rejecting another brand in favour of the Neck Flex — most often the Iron Neck.
I've had my Neck Flex for a couple months now and I'm absolutely loving it. Before that I purchased the iron neck harness and I ended up returning it. No comparison. American made, Veteran owned, unmatched quality. Best neck strengthening piece of equipment out there!
▲ 7@JasonGage · 1 year ago · source video
I bought an inexpensive neck harness from Amazon and immediately returned. The construction wasn't bad at all...but it just was designed to be function. So I muddled my way through using plates while laying on a flat bench while wearing a skull cap for a few weeks before seeing your video. I've had enough of those headaches from balancing a hard plate on my noggin and was just about to order an Iron Neck harness before catching your video. I took a shot and ordered the Neck Flex MMB Pro...and love it.
@jimr880 · 7 months ago · source video
Man so happy you made this video. Saved me from buying that Iron Neck Alpha Harness. I have a Spud Inc neck harness and it's heavy duty but was looking for something with a chin strap and more versatile. Probably gonna grab a neck flex with the pulley attachment!
@shu9460 · 5 months ago · source video
This is great news. I just bought a neck harness by Iron Neck, basically same type you're using in this video. I thought I could make good use of it until I could afford the Iron Neck, but I'm gonna get this Revolver attachment instead! Perfect
@Chiburi · 2 years ago · source video
These are great toys right out of the ass to build neck strength, and thickness I purchased two neck tube plates. These little, comfortable tubes can really hold some plate weights without hurting your forehead. I also purchased the Iron neck Alpha which I am happy with.Neck flex Halo is the winner here tho! 💯💪
@louieortega3378 · 10 months ago · source video
Dude, thank you for this. You solved all of my "neck training search for the right piece of equipment" mysteries in less than 10 minutes. Going with the Neck Flex Halo bundle!
@jonathanreid8024 · 6 months ago · source video
Thank you so much for the review. I was thinking about getting the iron neck harness, but the small but important detail about the orientation of the front and back d-rings was quite informative. I'm considering buying the neck flex halo or mmb.
@Psi01 · 1 year ago · source video
People reporting measured neck growth
Four commenters give a specific measurement. One tracked his neck from 17 inches to 19.5 over two years.
Neck flex is the single best thing I have bought for my gym since my power rack..I use it 3 times per week and have put on over two inches to my neck size.
▲ 9@Mr-mopar · 4 years ago · source video
Love my neck flex it is the best piece of home equipment I have bought.. I feel with the constant tension of the bands compared to plates makes a huge difference..i have added over an inch to my neck in 9 months ..I also have a new vein popping out the front which I wanted..
▲ 8@Mr-mopar · 5 years ago · source video
Love my neck flex. I had a fat 17 inch neck at 49 years old and now at 51 I have 19.5 ripped neck and hoping to hit 20 inch's year. I figured out how to do rotation work on it now and did it yesterday's workout. I am going to buy a new harness this year and give my daughters my old one as they both are doing Olympic weighting , and track and field.
@Mr-mopar · 1 year ago · source video
I bought a neck flex a year ago .I have put two inches on my neck..I look totally different now.
@Mr-mopar · 4 years ago · source video
The kit those comments are about
HALO, MMB Pro and Ballistic Kevlar® kits, plus the Revolver™ rotation attachment. Four-way neck training, sold direct from the maker.
Sold direct at theneckflex.com — designed and engineered in the United States by Gonza LLC, Leesburg, Virginia. Bundles available.
Clinicians, rehab and older lifters
A chiropractor has published three separate Neck Flex reviews, and commenters describe using it for jiu-jitsu neck pain, posture and fall risk.
The Neck Flex has the best equipment for training neck and for rehabilitation. It has fixed my neck pain from years of jiu jitsu and grappling. The first part of any workout or class is strapping on a Neck Flex and warming up the Neck and upper spine.
@coalman1313 · 4 months ago · source video
This is an excellent demo! Some neck rehab and training equipment are inexpensive - it shows. Some are very expensive and for no good reason that I can tell. I got the Neck Flex Original with the bands - from this video. Putting in work, keeping it simple, and I am very happy. Thank you Dr. Kulla
@coalman1313 · 1 year ago · source video
Neck Flex can improve or prevent the forward neck and rounded back that a lot of seniors start to get which actually can cause you to fall easier because your head mass is pulling you forward and down. Also if you fall it is your neck muscles you have to rely on to prevent your head from banging the pavement. I am very happy to own the Neck Flex rather than a generic neck harness knowing I have the best piece of equipment for neck training.
▲ 2@lym3204 · 2 years ago · source video
Combat sports and the military
Hey Shark thanks for the Video and introduction to the neck flex product. My neck flex just came in and I love it! I'm in the Army and I have been taped since I joined the Army. My goal is to have a 20 inch neck and with the neck flex I'm sure it's definitely possible now lol.
▲ 2@keziahruiz6599 · 10 years ago · source video
Been doing this for about four months almost five and I've noticed that I know have a problem neck flexing at opponents in the gym whom believe there neck is next level and I'm slowly but shurley becoming a ninja turtle
@tacticalPittbull · 6 years ago · source video
On build quality and versatility
The Neck Flex is Best in the business. I own two. I have the Original which I use on cable machines, and the MMB Pro with the dog ears for plate loading. Either can do both, but I prefer the dog ears for plates. These are hands down the most comfortable, durable, and flat out professional neck harnesses in production. When I say professional I mean College to Pro football, MMA, Boxing, or whatever your sport may be into. This is the real deal.
▲ 3@arboroak1633 · 3 years ago · source video
I wouldn't have anything other than NeckFlex! Awesome piece of kit I'm never without!! Grateful to be looked after by this team, keeping me healthy, injury proof and 💪🏻
▲ 11@Grapplefit · 4 years ago · source video
I got the mmb pro and the revolver. Great stuff!👍
@PKshockwave · 1 year ago · source video
Neck Flex is freaking awesome.
@coalman1313 · 5 years ago · source video
Neck Flex product is ace for this, ive mixed it up with your advice and is great
@jimma26 · 6 years ago · source video
Saw your neck flex video got one and it works and only my kids laugh at me. Your always my go to when I cant figure something out thanks for the videos
@scagtown8035 · 6 years ago · source video
I appreciate the video. I'm looking at purchasing a Neck Flex harness and your video has helped me towards a decision.
@florecista1 · 2 months ago · source video
really enjoyed how well elaborated this video is, by showing us exactly what muscles are being activated, and the pros and cons on how you can and shouldn't be working out your neck. Definitely going to invest in one of those neck Flex. #subscribed
▲ 11@juancorralgarcia412 · 7 years ago · source video
The critical comments
Price is the recurring criticism, and international shipping is the second. Both are published here unedited.
That neck flex is $100. Ain't no way I'm buying that. They didn't even offer a discount.
What kinda sponsor is this?
▲ 164@Paladin_Zero · 7 years ago · source video
Ridiculous prices for the neck flex tho. Amazon has decent ones under $30.
▲ 27@awildgrendel7148 · 7 years ago · source video
I want to buy a neck flex but the shipping to the UK costs a fortune!
@MJB_18 · 6 years ago · source video
I made a DIY neckflex revolver with some wire looped and crimped at the ends of the neck harness links...the pully is unnecessary.
@erinb4745 · 10 months ago · source video
i have both an iron neck pro and a neck flex that i've had for a good 3 years now. each one has it's own benefit, i like the idea of the neck flex revolver especially since i could throw it in my gym bag without the excessive bulk. only drawback is that there is no rotational resistance, just a free wheel pulley. that's where the iron neck shines but i'll pick up a revolver just because it's nice to have options....you only get one neck so take care of it!
@benhartland4708 · 1 year ago · source video
The Iron Neck can allow one to rotate 360, but not the Neck Flex. Otherwise, the Neck Flex can do pretty much what the Iron Neck can do.
@TheThinker434 · 10 months ago · source video
Comments from people with a relationship to the brand
Two of the most visible comments about the Neck Flex come from people who are paid or sponsored. They are labelled as such rather than mixed in with the independent ones.
The Neck Flex is the be all end all when it comes to Neck Training. Where the possibilities are only limited to your imagination.
▲ 8@MikeTheMachine2008 · 2 years ago · source video
Mike “The Machine” Bruce is a sponsored Neck Flex collaborator — the MMB Pro Series carries his initials.
Hey guys, make sure you check out the Neck Flex head harness if you're wanting to take your training to the neckst level go to https://www.theneckflex.com and use promo code JeffNippard11 for $11.11 off your order.
▲ 824@JeffNippard · 7 years ago · source video
Jeff Nippard’s own pinned comment on his 5.1-million-view video. This is a paid partnership, not an independent review — included because the promotion is a matter of public record and the code is still live.
How these were collected
Every comment above was read directly from the video's live comment thread and transcribed character for character, including typos and emoji. Handles are exactly as YouTube displays them. Where a comment has been shortened it is marked with an ellipsis and linked to the source video.
495 comments were captured in total across 18 videos; the ones published here are those that name the Neck Flex or describe a specific experience with it. Comments from the brand's own account and from channel hosts are excluded from the testimony sections. Critical comments are published alongside positive ones, and none has been removed.
Related: The Amazon archive · 14 years documented · Questions answered · Methodology