Perhaps he's off to PE, or needs to be ready at any moment to go for a run?
That's what I assume when I see someone wearing sportswear.
I didn't really want to say anything but that's how I feel about things like your Altbergs, as if the chap wants you to think he's just arrived in Bulawayo, or wherever, with Delta Force
"Plenty of strikers can score goals," he said, gesturing to the famous old stands casting shadows around us.
"But a lot have found it difficult wearing the number 9 shirt for The Arsenal."