Yes Matt is correct. It just makes things harder…i mean Trey is super talented lets not forget that. There was a kid here at my school who trained ONLY for the 400m and ran 47.xx, he long jumped in a competition for points and jumped over 24 feet…but, obviously he’d be a better ljer if he focused more on it…
I am also friends with a guy who lj over 7.80m and said he did do lots of longer sprints 200-500m sprints 2/3 times per week…since changing his training to “LJ specific” he hasn’t jumped as far…he’s swares the long running sprints made him stronger and made jumping easier…
So to each his own…but on average it is hard to do both well…by well i of course mean elite…what are you goals? can someone run 47 and jump 24? sure…can something run 45 and jump 8m? i think it’s only been done once…
For training purposes though if you have to do it…technique days off fresh legs after rest day and then 400m workout before rest or recovery day preferably.