1217

submitted 3 days ago by fossilesque@mander.xyz to c/science_memes@mander.xyz

118 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[-] merc@sh.itjust.works 24 points 2 days ago

What's amazing is our ability to calculate the path of something in the air.

There's a test they did with Cristiano Ronaldo where someone kicked a ball to him so he could head it. They shut off the lights before the ball was in the air and somehow from the body shape of the person kicking it, he was able to know how to make contact with it without being able to see it.

https://youtu.be/0k2ey_okQ4E?t=1255

[-] prole@lemmy.blahaj.zone 3 points 2 days ago* (last edited 2 days ago)

Pretty impressive. I think they're underestimating/ignoring the input from hearing, especially with the second one where he probably (subconsciously, of course) heard the ball bounce near his foot. Plus the subtle changes in air pressure around his legs to tell where the ball is, etc.

Cool video, thanks.

Edit: Still watching as they're analyzing his free kick. Cool shit. The human body is wild.

One thing I don't really see people talk about is how Ronaldo (and other soccer/football players) use their opposing leg to kind of hop up and dissipate any energy that they didn't transfer into the ball. Fucking cool. You don't even realize it's happening.

I haven't seen any videos on it, but I remember doing kinematics problems in school involving baseball pitchers and how they throw, and it is actually insane. Each joint and section of the pitcher's arm is like perfectly timed to provide the most velocity to the projectile. So you add up the momentum from the swinging shoulder to the momentum from the elbow to the momentum from the wrist, to the momentum and spin from the fingertips. Baseball is boring as shit, but the physics behind pitching is cool af.

[-] merc@sh.itjust.works 1 points 1 day ago

Hearing is definitely part of it, but I imagine it's only hearing the sound of the ball being kicked. After that it's going to be far too quiet to hear until it gets close, and he's obviously reacting long before that. Maybe hearing helps him adjust in the last tenth of a second, but he's not hearing the ball's entire flight.

As for the body mechanics of a pitch or a kick, it is amazing. Like, a proper powerful punch involves leg muscles, hip muscles, waist muscles, chest muscles, and only then do you start to get to the arms. For most of us, the best way to realize how coordinated everything has to be is to try to do something with your wrong arm/leg. Everything that flows naturally on your strong side is just completely wrong on your weak side.

[-] iAmTheTot@sh.itjust.works 3 points 2 days ago

I'm not a fan of Ronaldo but that was very cool to watch, thanks for sharing!

[-] merc@sh.itjust.works 1 points 1 day ago

Ronaldo's ego is incredible, and he's almost always looking out for himself in everything he does. But, you can't deny that he's one of the best ever players. And his charisma means he's a great choice for something like this where he has to perform and interact with all the "scientists". Someone like Messi could do the same kinds of moves, but he wouldn't be able to chat with the presenters and "scientists" between events in a natural way. (P.S. I love that they got someone named Ronald to be the ordinary guy who couldn't do anything useful, that was just funny.)

I also think Ronaldo genuinely cares about all the biomechanics and all that, as long as it's something that applies to him, and that he could use to make himself better. A lot of other players just play on instinct and don't want to have to think about it.