Cutting Open The Nike ZoomX Vaporfly Next% (You won't believe what's inside!!) 

Enter for a chance to win a brand new pair of Nike Zoom Vaporflys + 100 packs of Run Gum here: rungum.com/vaporfly

"I'm going to be careful I don't want to damage the carbon fiber" 5mins later *saws through it*

Those tests... Oh, man those tests. The scientific method was murdered.

jumps twice in a pair of shoes: "Now that is a lot of data"

"You won't believe what's inside!!" Foam and a carbon plate? Pretty sure that's in every ad for these shoes.

Respectfully, your conclusion is wrong. Hi, my name is Ethan I am an Aeronautical Engineer with a degree in Mechanical Engineering along with a Masters in Systems Engineering and Design. There is a mechanical advantage because of the carbon fiber structural piece running through the length of the shoe. The term spring comes in all types of forms. What we have here is a cantilever beam type of spring (similar to that of a diving board at a pool)(also known as beam stiffness or bending stiffness). Bending stiffness. The bending stiffness ( ) is the resistance of a member against bending deformation. It is a function of the Young's modulus , the area moment of inertia of the beam cross-section about the axis of interest, length of the beam and beam boundary condition. In other words if you flex the shoe while running or jumping it will want to return to its center (flat) orientation. It is doing this because the carbon fiber is acting as a beam. That return of it's flat orientation helps your toe's not have to apply as much force to result in the same work output. Now, if the carbon fiber was very very thin I would agree that it would not have an advantage....but your cross section view (cutting the shoe in half) showed us that the carbon fiber piece has some thickness to it. This results in material grains being stretched on the bottom half of the carbon fiber piece and material grains being compressed at the top half. This is what causes the spring effect. It's also important to note that all shoes have this to some extent with whatever material they are made out of. The difference is that most materials shoes are made out of do not have nearly the beam stiffness that carbon fiber has. My final opinion is that I do not believe it should be banned because technology has always taken us to new heights (figuratively speaking), why stop now.

hey nick, I was a researcher in a biomechanics lab and I've worked extensively with carbon fiber on quite a few projects, maybe I can answer some questions regarding the nature of the foam and plate combination. When you put force through items stacked on top of each other (in series) the modulus (bendyness) is proportional to the parallel combination of the moduli of the layers (A*B/A+B). because the resultant modulus of the parallel combination will be much lower than the sum of the moduli of the underlying substrate, the carbon fiber needs to be very firm to act as what we call a detent spring whereby the plate is very rigid to account for the foam. I have some theories on the manufacturing techniques and methods for the foam that they may use to increase elastic rebound but I can't exactly test them and I'm not in a position to drop 250 like that. Anyway the plate does in fact deform elastically under load, and it's that resistance to deformation that results in the springynes you see. as far as if it should be cheating, I don't think so, it's just an advancement in materials to me.

Showing us what an aglet is like we didn’t watch phineas and ferb

*Does 1 trial* "tHaT's A lOt oF dAtA"

my ap stats teacher is rolling in his grave over these tests

You should’ve ran on different days to get a more accurate reading

I love how we are watching him destroy a pair of shoes for which most of us would die for.

"Go go gadget trampoline shoes" lmao

guy, that's a box knife. far from a scalpel

12:45 You’re welcome.

There's literally no way to prove that you used more energy when putting the shoes on because your brain wanted them to be better

A-G-L-E-T! Aglet! Don’t forget it! If you know, you know

Doesnt want the carbon fiber damaged, saws it in half.

I think the biggest advantage for your test was that you were going from a 9.4 ounce shoes to a 6.4 ounce shoe that has the same amount of cushion. Also, I think Nike's foam is the main advantage with the carbon plate creating support.

10:03 " I don't want to damage the Carbon Fibre Plate" 12:25 Cutting through the Carbon Fibre Plate with a Saw 😂😂

Nick: I'm gonna be careful with this carbon plate. Also nick: sawing off the shoe.

I feel like the difference in the jumps could've been chalked up to you getting used to the actual motions of the jump you were doing. Regardless, thanks for dropping 250 so we could see the autopsy!

When you run slow like me it won’t matter what shoe lol.

imagine eliud kipchoge saw this test, he will run full marathon in tears.

That Nike store is my favorite store to visit whenever I'm back home in Eugene. I cried inside as you cut them open.

From what I've gathered, the zoomx foam is what gives the bounciness, and the carbon fiber plate does the same thing that a spike plate does for a track spike. The stiffness of the plate reduces energy costs.

All shoes have a mechanical advantage. That's why we wear them.

imagine returning those shoes

Next video: "Cutting Open Nick Symmonds (You won't believe what's inside!!)"

2:41 Who else thought there were two nicks?

Who else learned what aglets were from watching Phineas and Ferb

"I don't want to ruin the carbon fiber plate"... whilst totally annihilating the entrire shoe LOL.

The difference grew the further you ran. Probably would be more noticeable in a longer distance test.

This was a GREAT video!

11:27 My man forgot he was an Olympian haha

A tear almost fell whilst watching this

My heart sank to the bottom of my stomach from watching this lol

4:41 dang that's a pretty fast heartbeat

That was painful to watch, but really cool! Thanks for this!

That isn’t the patent for the Vapor Fly NEXT% shoes. That is for the Alpha Fly shoes that aren’t publicly available.

the shoe patent you downloaded was for the alphafly unreleased shoe use in 1:59 challenge. Those shoes have the air pockets. you took apart the next% which where release last year.

Eluid Kipchoge’s shope had an air poket. The pacers ran in the standard version.

13:45 Nick Symmonds: I am not paid by *Nike* Nike: Okay! We will pay u know

Drinking game: take a shot every time he says “carbon fiber plate”

Wow - there's literally nothing in the construction of these shoes. A few dollars worth of foam, synthetics and an inexpensive plate of carbon fibre. Regarding the plate/spring effect, it's probably due to the composite behaviour of the material. the carbon would be good at spreading the load into the foam, so you get to use more of the foam across the sole as a spring. As well as compressing the foam under it, the shearing forces as the foam is squeezed out the sides would also be available as rebound. Neat design, excellent marketing, fantastic profits.

Nick you were once a great runner but when it comes to physics you really don’t know what you are talking about. The carbon fiber plate acts a lever instead of a traditional spring. The zoomX foam definitely acts as a spring as well but the combination of the elasticity of both components is what makes them so great.

So cool you’re working at Nike store and in walks Matt Brody!!!!! Two gold medals!!!

I am sure somebody could use your method and “prove” exactly the opposite. You did prove that Nike has a better marketing organization.

You said, you were not paid by Nike, but you sounded like a “scientist” hired by Nike.

nick: "roadmap" Me: "does are the alphafly not the next%'s lol!"

Legends says that till now he is extracting that carbon fibre plate 😂😂

Could the difference in bpm be due to the fact that the first mile functioned as a warm up for you? Just like in a workout.. the 2nd set is often easier than the 1st.

You literally "*Took Flight*" right there lmao

And also, you’re looking at a breakdown of the alphafly - that’s why there are no air pockets - you’re cutting the vaporfly open

The carbon fiber acts like a built-in mini-pole vault pole in every step. It acts as a leaf spring, storing energy from compression in the heel and midfoot, bending, then it straightens back out and adds push off from the ball and toe. That is also how those VKTRY carbon fiber inserts work.

After running these shoes for a few months, it’s pretty clear they have some sort of mechanical advantage. The easiest way to tell? Bend the toe of the shoe back and let it go. It feels like it has some progressive spring effect. It definitely helps your foot “push off”. They aren’t my favorite shoes or my most comfortable but they are my fastest.

Nick, I thought when you busted open the shoes some RunGum was going to come out-then I’d really believe the shoes were performance enhancing!

Awesome video. For a 1-1 test between shoes, it would be best to do each test in reverse, so with the NIke shoe being tested first, and then the Hoka Clifton just to have a side-by-side comparison of the results since your body does get a little bit of a chance to warm-up between the first test of the shoes and the second test with the second pair of shoes. Thanks, Nick!

yo i love it when you fast forward it shows that ppl can glitch too

Runner: That magical -- wait for it -- carbon fiber blade! Cyclist: Hold my '05 carbon frame.

Hats off to Nike, as he is still wearing his RunGum hat. 😆

That “rigid” plate of carbon IS a spring. With each step the weight of your body flexes the plate inside the sole. The energy stored up in the bent plate releases into your legs as it unbends, instead of mostly being absorbed by the ground, helping propel the body forward.

A man that withdrawals not taps... A man of culture

One man's scalpel is another man's standard box cutter

This is a snuff film, I'm so traumatised 😭💔

I'm here just to make sure there is actually a carbon plate as advertised. Thanks man!

“Nike is super super protective of them and no average person can get their hands on some” me looks over in the corner at my alphaflys on my shelf.

You seriously used a vertical jump test as a means of testing running shoes?

As interesting as it was to watch you cut this shoe apart. I am having an extremely hard time trying to find these shoes to actually run in for retail price. People want double the retail price and I cannot pay that 🙃

Whats Inside

You jzt sawed through my heart sir. I am even having a piggy bank titled " "myvaporfly" in my bedroom.

With the jump test it does seem like the higher you jumped was due to to the gradual increase in the amount you were bending your legs seems like it varied a lot lol 😂😂😂

It would be interesting to see Stryd power meter data. Especially leg spring and form power

i like the way, he tries to be scientific and tries to explain the addition of carbon fiber. Why i am watching this.

I like that you made the fast forward so fast it looks like your running backwards

Love the personality and realization that this is FUN, not some scientific proof... Do you remember fun? Unbelievable the amount of haters and negative people in the world. They need to go find something they agree with and comment on that.

Great video! Even if you didn't find anything fishy, this shoe helped break so many records easily. It helped you run and jump better. I don't know if you can say it is still a legal shoe.

"this is a lot of data" LOL

Crazy part is he spends $250 for a pair of shoes he just cuts up when I can’t even afford a pair for track😂👍

Nick giving a good review on the shoes on purpose so he can get sponsored by nike again:

When and if the Alpha Fly drops will there be anyone brave enough to destroy it?

It would be cool to see a picture of just the carbon fiber plate without the foam around it!

I mean...ur heart beat becomes more higher in zoom x because ur very excited and cool about this shoes lolll

BTW the air pockets that he is referring to that weren't found in the shoe are actually found in Eliud Kipchoge's version of vaporfly called the Alphafly used in the Ineos 1:59 challenge when he broke 2. It's different from the Next%

Would Alberto Salazar recommend this for someone not on illegal PED’s?

you could do a p-test to see if theres a significant difference

A video every single week=A shoes cut every single week.

Dad: son, are ya winning? Me: 12:25

why am I watching this while eating chips in my bed lol

when you can't enter the giveaway because your not American

Bro I am also an marathoner that was my dream shoes after seeing this video my eyes were feels with tears

Wonder if after cutting away the upper, you could have gone back to the Nike store and said, "I was on a run and the whole upper tore off... I thought I was Zion Williamson for a second". Think it would fly? Hah. Great video from treadmill to jump test to show deconstruction. Real cool.

when he takes a running start for his “vertical” jump with hothead vaporflys but not with the cliftons. what a scientist

a springlike material doesn’t necessary mean there is a spring...

I run with $50 super lightweight Tangens, with orthotic shock inserts, and got my best PR 3:30:40 nyc marathon!

The roadmap is the alphafly next%

When ur cutting shoes it's kill my heart badly missing

When u were training at a younger age ( teen) how many days a week did u train

Hallelujah........Today, I found and bought Run Gum at my local Wal-Mart.....Gloucester, Virginia. Like in Target stores, it was located in the sporting goods department. At age 77, I'm looking forward to using it at my next race....a four-mile Turkey Trot on Thanksgiving morning.

The patent shown was what kipchoge wore in the ineos challenge. Nike designed a prototype for him which is an iteration of the next %.