Question 1

How is Will Bosi so strong in bouldering?

Accepted Answer

When I watch him, it’s not just “strong fingers” in the simple sense—he’s insanely efficient. He uses a lot of open-hand gripping on slopey edges, with almost zero wasted re-gripping. And he’s super aware of momentum management, which saves strength on the hardest moves.

Question 2

What does Mani the Monkey notice about Will Bosi’s technique?

Accepted Answer

The precision is the first thing: speed and precision, every finger fits perfectly, bang. He’s also really good at locking holds in place as he weights them—sliding into the position and then committing. Plus he’s flexible and uses high heel hooks very naturally.

Question 3

What is momentum management in climbing (as shown on Burden of Dreams)?

Accepted Answer

On Burden of Dreams I pause and point out how his foot steps are not random at all. He’s building and reducing swing on purpose—swing out, swing back, then go—so the dyno becomes stickable. If you can reduce swing, you don’t have to “hold” bad holds for as long, and that’s massive on limit boulders.

Question 4

How tall and heavy is Will Bosi, and does it matter?

Accepted Answer

From the stats I looked up, he’s 175 cm and around 67 kg with a +2 ape index. For me 175 is basically perfect for bouldering leverage, but 67 kg is actually not super light for that height. And still he’s doing V17, so clearly the movement efficiency and finger strength are on another level.

Question 5

Is Will Bosi mostly an open-hand climber or a crimper?

Accepted Answer

That’s what’s cool: he can crimp, obviously, but he doesn’t need to full-crimp everything. On Alphane you see these very slopey edges that are predestinated for open-hand, and he just takes them beautifully. It’s a big part of why he looks so smooth on insanely hard terrain.

Question 6

How does Will Bosi compare to Adam Ondra on Terranova?

Accepted Answer

Young Adam on Terranova looks super chiseled with that crazy brachioradialis “sailboat” popping at the elbow. Will, in comparison, looks almost like a normal dude—less ripped, less obvious striations—and still climbs it super solid. It’s a nice reminder that performance doesn’t always look like what people expect.

Question 7

Why does Will Bosi look so ‘normal’ but climb V17?

Accepted Answer

That’s exactly what I keep laughing about in the video—he looks like an everyday nerd from the street and then just climbs 8C+/9A. He doesn’t have huge muscle bellies, and his body fat doesn’t look ultra-low like some comp physiques. The strength is clearly concentrated where it matters: fingers, positions, and movement skill.

How the Hell is Will Bosi SO STRONG? Mani Reacts

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