A quick image search turns up kind of the same thing in every running shot - at the very least his shoulders are huge - and you can see it a bit as he does his signature pose, as well. It makes sense to me - he, and sprinters in general use their arms quite a bit. Running has to be a whole-body process to be efficient; a cyclist couldn’t do it the same way.
He does look pretty thin around the midsection in everything, though. And yeah, this image might be AI, or just photoshop.
What you are describing is being ripped, not jacked. He is indeed very ripped irl, but not jacked
Being ripped: Having low amounts of bodyfat so your muscles have visible striations and vasularity
Being jacked: Having lots of muscle mass, regardless of definition.
Having so much upper body mass would be a disadvantage for a sprinter
TIL they aren’t just synonyms, as slang.
A quick image search turns up kind of the same thing in every running shot - at the very least his shoulders are huge - and you can see it a bit as he does his signature pose, as well. It makes sense to me - he, and sprinters in general use their arms quite a bit. Running has to be a whole-body process to be efficient; a cyclist couldn’t do it the same way.
He does look pretty thin around the midsection in everything, though. And yeah, this image might be AI, or just photoshop.