What is Usyk doing?

Usyk exercises motor skills under load. I have never seen an exercise like this before; I saw it differently.

 

And even if that's the case, then worst for Fury, cause Usyk will be even in better shape. Oh, dear this Tysonettes .....

And Usyk haircut suggest it's recent. You can see the so call pre-recorded one in his channel, like this one.

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Man I did that hook exercise that Usyk is doing with 12kg weights! Then Usyk says, "your shoulders shouldn't be strained". Meanwhile, I tore my rotator cuff ...

 

Also, and this is wierd, but Russian seems to have Latin derived words in it. It's complete gibberish to me and then boom, all of a sudden a word jumps out at me that has an analogue in Italian and sounds the same. Looking down at the subtitles I see that I got it right. So strange.

 

Looks like a good workout tbh

covering core
arms
shoulders