The Strongest Fingers in Climbing: Will Bosi vs. Matthew Mendes!

In this epic video, we bring together two incredible climbers for a head-to-head board training session! Matthew Mendes, a rising star in the climbing world, is known for his insane finger strength, surpassing even the most elite climbers. Coached by Tom Randall for over a year, Matt's fingers have become the strongest we've EVER tested at Lattice Training. But how does he compare to Will Bosi, one of the world's best boulderers and the man who previously held the record for the strongest fingers we've ever seen?
Join us as we pit Matt and Will against each other in this ultimate test of finger strength and climbing skill. Who will come out on top? Watch and find out! 💪🧗‍♂️"
DISCLAIMER: The contents of this video are for informational purposes only. By watching this video, you agree that any actions you take as a result of the information or content provided are entirely at your own risk and Lattice Training Limited shall not be responsible for the loss, or damage, of or to any property or to any person arising from the same.
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[@LatticeTraining]

Will named their new problem "Grandma's Biscuits" in homage to the humble Fox's Viennese Melts. It's up for anyone to try 💪🍪

[@00PlPu00]

"Was it a fart or a pulley"

[@Fromagic3]

haha i vote

[@dantecpp]

you genious!

[@ashhodson2063]

No it's just Tom's voice 😂

[@benigempi]

I think the reason for the fewer ascents of the 7B+ is that In the V-grades 7B and 7B+ are both V8s.

[@LatticeTraining]

More effort, equal grade. Ego = 🫠

[@deltaflux2381]

That's why Vermin scale is inferior to Font scale

[@monum]

Wouldn't another reason also be that most gyms set boulders up to 7b(+) because that's commercially more sound and leave the harder routes for these types of walls?

[@CookieMonsteeerrr]

Insane session

[@tommeyer3871]

The sheer volume of hard bouldering in a single session is mind-blowing and so is how few attempts some of these seemed to have taken. Cool to see both athletes share a session, I'm sure this is also massively inspiring and helpful for Matt

[@Climbinsilence]

Moonboard would be interesting to watch!

[@russellmay4299]

2016 set would be nice to see

[@ashhodson2063]

Would it really 😂😂

[@russellmay4299]

@ashhodson2063 why you such a miserable cunt? All your comments are negative

[@romcheg1674]

Would be painfull to climb😂

[@FullSpectrumClimbing]

Them: V6-V8 for warm up Me: Takes a break walking up the stairs

[@jakobbauz]

Do you, really?

[@AirborneLRRP]

"Grandma's Biscuits" or "insanely good biscuits" or "in general, too expensive to buy" - name of the new climb Love you guys

[@amberblackford9999]

Haha I’m loving Grandma’s Biscuits

[@LatticeTraining]

Will used your name suggestion of Grandma's Biscuits. Great thinking!

[@ndgb_]

Dude I’ve been a follower of Matt for so long so cool to see him get picked up by lattice 🙌

[@ComputerManDanMiller]

Gotta give David Fitzgerald a call to come in and do the Lattice tests! I think he's around the area right now, Aidan mentioned on the Pod that he was going to be climbing in Ireland with him, that would have been just a couple weeks ago I think at most.

[@Leo-gy8lg]

Second this!

[@felixbrown8634]

He’s said to have insane strong fingers

[@assaqwwq]

Unknown #11

[@anelivb]

5:00 Will Bosi skipping holds on your dream project

[@willadams6217]

"Burden of Bosi"

[@alisoncurran9631]

The campus-ing 11ish mins in. Unreal finger strength! 👏👏

[@jakobbauz]

Ya. And Bosi is so controlled he seems to float, almost.

[@jenn-ningyong3285]

Biscuit interlude and review was money.

[@thicc8971]

Biscuit Interlude would be a sick name for the climb they put up!

[@sora_mugen]

I think the best name would be the "Boss Men" as a combination of Bosi and Mendes names and as a celebration of how bossy this men are😂🎉

[@chaozzah]

If you could find someone crazy enough, with a climbery build, I wonder how hard they could climb if you would let them train their fingers up to crazy strength (comparable to these mad lads) but never letting them actually climb. Also just.. onsighting these grades, on a system board. Wild.

[@Misha_Gaff]

All other muscles involved, that's why these guys are shredded.

[@felixleblanc-vh2ij]

15:33 Will who just casually starts chatting after this hugee swing

[@ignacionogalesaisa831]

You see? It IS possible to leave the shirt on in a climbing video. Well done guys!!!!

[@LatticeTraining]

You've been watching too much Magnus!

[@sheryinmoua8486]

8:34 the sheriff was sick asf

[@julesdubi4312]

Get these guys on the TB2!

[@LatticeTraining]

I'd love that. But I am not sure we have one if the UK. Maybe London?

[@fishsticks248]

@@LatticeTraining Font Borough is getting one this autumn! I think Kendal Wall is getting one soon as well I think.

[@BobBob-ye2my]

​@@fishsticks248Kendal is getting one. Should be ready very soon. It's been installed and has most of the holds etc on it.

[@danschmidt5189]

How do Matt and Will's hang numbers compare to their active force production numbers? The gap can be pretty enormous; e.g. IIRC Alison Vest is obviously incredible at hanging, but far more normal when actively contracting. Would love to see if that explains why Aidan performs so relatively poorly at hangs, too.

[@lucaandreolli]

Boulder name: "Fox's melts"

[@Figuring-Things-Out]

So nice to watch how beautifully Matthew climbs!

[@marmitericecake]

never thought i'd see the day. well in matt

[@DaneFerolin]

love to see them crush the classics

[@Taggi]

«Next one is good»

[@qwertyboy1234567899]

360x360 was set by one of the regulars at my gym, awesome to see a local setter!

[@diegopommares6257]

"beans on toast"

[@ginpatsusamurai]

Mind boggling strength from the Bosi bossman

[@qweasd9153]

the boulder looked like death crimping everything

[@imxd9698]

what af ucking insane session…

[@francoclimbing]

The dog is enjoying with us, this climbing session with 2 legends in it! 🔥👏 (09:27)🐕

[@jasdfpasdfakdsjhfa]

Have you tested the fingers of Yves Gravelle?

[@Jdorty]

"Hashtag 10" Ah, yes, much like the old Chapter Hashtags.

[@Lunar67777]

the fact he is stopping and watching to the camera casually like if it was a v2 haha but it's a v13💀(15:35)

[@pronoob7296]

"Finger Massacre" The name seems to describe the boulder pretty well. Very impressive finger strength to hold those tiny holds at such a steep angle.

[@tomriddle2257]

The thumbnail makes it look like Will Bosi has medium finger strength. RIP me.

[@thezigzagwanderer000]

"Burdened by Drams"

[@DragoTC]

Why has nobody recommended "Crimpy McCrimpface" yet?

[@daphnisetchloe]

>testing strongest fingers >kilter original

[@langosc]

"Biscuit interlude"

[@tshorty90210]

I like the name Crimp Walk

[@GrantDayZA]

The strongest or the strongest you have tested. A rather massive difference.

[@igorullesilow9122]

"let your fingers dance"

[@neoleung6995]

Wanna see Aidan Roberts on the last two climbs Will and Matt made up!

[@denislejeune9218]

'The Broken Ladder'

[@MathemticsCore]

Grab Aiden next time as well!!

[@clown5911]

3.5hrs on a board is crazy...

[@grimpisme]

Hi, could you share Matthew's test datas?

[@timcross8379]

This Bosi guy seems good on a board. Has he done anything outside? :)

[@IAMDIMITRI]

His forearms are bigger than his arms, that's really cool.

[@NorbertF-n4c]

"Do You Even Crimp?"

[@mikeumali2230]

Will skipping a hold on a v9 problem is crazyy 5:00

[@HourRomanticist]

Have they tested Megos's fingers?

[@maayazi]

Will. I think more people climbed 7c than 7b+ is cause in V-scale 7b+ and 7b are both V8 so people were less intrigued to try those "harder V8s"

[@mattgriffith5216]

If you still need a name 'anythings Bosi-ble'

[@bjdfit]

Boulder name: Great Cornholio

[@Voidload]

I love Will Bosi!

[@rundown132]

24 mins? rent is due bois

[@reubenbacon9156]

Call it will Mendes. Sounds like some pop singer 😂

[@escanor_xx]

"Micro Peter"

[@zealous261]

15:50 I thought 8B was the top on the moonboard as well. Well, at least on the 2016 moonboard because you have black beauty which is 8B. Is the top different on the newer moonboards?

[@alexantone5532]

There are 8Bs but very few climbs go above 8A, even fewer above 8A+. Just sandbaggery

[@isakhammer6558]

Sheriff was neat!But I suppose it is easy to avoid the sheriffmove all together?

[@osikbrodsky3581]

please make will try Jellyfish

[@nickdefrancis]

Did Bosi really say "unkown hashtag 10" instead of "unkown number 10"??? What an absolute zoomer lmao.

[@letsgocamping88]

And that's why wills goes to iceland

[@usershilov]

They have the strongest fingers in the world, so lets put them on a board without any real crimps.

[@homayoonf]

what angle was the board?

[@paulvolt2963]

looks like minus infinity

[@motherlove8366]

It's 50 degrees, you can check on the app, hand torch has a different grade for every angle

[@bernhardlangers778]

While this is impressive and probably really good training for finger strength, I can't help but think: deadpoint from a crimp, deadpoint from a pinch, deadpoint from a crimp, repeat. So rather specific and more of a training for pros, rather than the average Joe.

[@clown5911]

Steep board training is great for strengthening the average Joe as well. You just do the V3 instead of the V13

[@joshaebischer]

Splaremo watching this 👁️👃👁️

[@tonyr248-1]

No related but there is a top Russian arm wrestler called Georgy Tautiev that looks exactly like Will Bosi haha

[@neaituppi7306]

It is funny when they make it seem like you won't be able to watch the videos or find out what happens unless you subscribe. It also make me feel like unsubscribing, but continue to watch the videos. Good tactic. 👌

[@DaneFerolin]

bosi is savage

[@aaronhauptmann869]

Test the strongest fingers in the least finger limited board out there ...

[@LatticeTraining]

Yeah agreed. We thought the Kilter would be more relatable to our wider audience. Would you watch another session on the Moonboard? That is where Matthew excels.

[@Miura.Powers]

@@LatticeTraining I would love that! Sure, the Kilter is more approachable, but here in germany the Moonboard 2016-2019 is far more common. But than again, i would watch a board seassion with strong guys/girls every week. Let them loose on the wildest yellow holds you can find....where is aidan btw? :D

[@LatticeTraining]

@@Miura.Powers Aidan is on a boat somewhere in the Atlantic! ⛵

[@tommeyer3871]

@@LatticeTraining I would definitely watch a Moonboard/schoolroom session. It is very relateable on the kilterboard though, that is true. For some of us the same applies on the moonboard, but maybe not your entire audience

[@aaronhauptmann869]

@@LatticeTraining I think you find the gnarliest home woodie in Sheffield and let them loose on that! Might not be able to try the same problems but it will be clear that I don't know anyone who can get off the ground on holds those dudes can pull.

[@asdfasdf-mi1vi]

"3 finger pinch"

[@Sssssss1X2345]

Literally any other board would make more sense if one guy is 1,68m

[@LatticeTraining]

Agreed. The Kilter dominates with big moves. We chose it because we thought it might be the most relatable. If people are psyched with board sessions we could consider round two on the Moonboard or even the historic School Room board.

[@aidanscarffe5256]

@@LatticeTraining School room would be mega! Have them try Aidan's new school boulders on there. Think they have both done the classics

[@vitaminmusic890]

Crimpy Mc'Crimpface

[@ShakespeareanBroncobuster]

Who has the strongest WEIGHT ADJUSTED fingers interests me. Bosi would still be very elite. Matthew probably weighs 56kg. He is still very impressive, but he is a smaller climber.

[@charliecenta]

10:12 frozen people on the slab in the background. Green screen 😂

[@samgoldsmith3759]

Bosi is the best outdoor boulderer on the planet and he can't buy the biscuits he likes without thinking about money - can sponsorships maybe pay out more?!

[@lucaa4480]

is it true that he started climbing like 2 years ago? wtf

[@dmitriydrozdov1035]

What?!

[@BillyTay]

yeah it is started climbing with him and from the start was a natural

[@Bobonautti]

Cookies 😊

[@TheMegaMrMe]

What's the wall angle?

[@yoga-ss6kp]

50

[@LaSpai]

😎

[@felixbrown8634]

Should be worth noting Matt has been climbing like 2 years and has stronger fingers than one of the best climbers in the world….

[@129iphone]

Source?

[@jamescunningham9277]

Glimpse crimps with no links

[@hj40]

That is disgusting! Now let's get them on a moonboard!

[@seagate43]

Pinky Force.

[@robmaule4025]

surely it has to be climby mcclimbface?

[@Nicoandthepage]

Crimp & limp

[@joshontherocks3291]

Sendy McSendface

[@LatticeTraining]

A classic but strong suggestion 👁👄👁

[@joshontherocks3291]

I’m merely an advocate for the good people of the internet ❤️

[@arnaudjouanin7561]

Crimp fest

[@jacksonwhitcup1185]

Lattice needs to get serious for once. I want to see you fly out monscogram/office worker and sponsor his training for 2 years, see what the real strongest fingers in the known universe can achieve.

[@Noneymar1]

they can achieve what he achieves rn i guess. Dont think that (especially) lattice would change anything on that. Just like Bosi would still be as good as he is without them.

[@whatever6874]

​@@Noneymar1No, lattice made bosi.

[@Noneymar1]

@@whatever6874 sure.. but it could’ve been any other training company, coach or motivational person. That’s what I was saying. It’s kind of a „training the elite bias“ Iam not saying their training is particularly bad (I don’t think it’s outstandingly good either but that’s not the point) - but if you’re training heavy outliers like Mendes and Bosi the content and quality of the training doesn’t matter as much as you think. They just outperform and outresponse - to lit anything remotely useful for their progression. Monscogram falls into that category too. Idk if you know him but he’s insanely strong training by himself. Like at a high percentage of his and current human potential. If he got there training whatever he does now, lattice won’t change as much as the OP thinks. And they would’ve not changed as much if they had trained him from the beginning. He would be strong with them coaching him just as he is now without them. Kinda proves my point tbh

[@Noneymar1]

@@whatever6874 I guess my point question was: would will bosi as good as he is now if he climbed and trained without ever meeting the guys from lattice? Answer is probably: yes, some strength(climbing ability) fluctuations could be there but nothing really significant if you look at the big picture. If lattice motivated him to stay consistent or even pick up climbing, yes, they „made“ him to some extent. But less with their training formula and more with them getting him to do something (and as I said I literally mean to do anything). It’s not like they suddenly move the natural barrier of what every climber can achieve potentially with their superior training ability. Bosi had this (roughly) barrier to begin with - just as moonscam. Maybe Lattice pushed Bosi a little to move towards it, maybe he would’ve done it himself anyways. Moonscam did it himself. You get me?

[@whatever6874]

@@Noneymar1 lattice said bosi was mediocre when he first started training. Also even if someone has elite genetics it is useless to talk about since you need to complete so much training to even start talking about genetic differences.

[@fatneck76]

Matt Will Mend Bosi!?

[@wolfgangpokorski4483]

"Lettuce and Shrimps" sounds like an appropriate name for this foodblog series?🫣