Alright, serious question for all you 400m masochists out there: What's the deal with embracing the 'brutal' and 'hardest' workouts as the *only* path to speed? Is there actual science behind pushing your body to the absolute brink every session, or is it just survivor bias and Instagram clout? Like, I get the grind, but at what point does 'pushing through' become 'pushing your body into early retirement'? Asking for a friend who'd rather extend their career than make one viral 'dying on the track' reel. What kind of smart recovery or less intense strategies actually yield results for the 400m without sacrificing your joints by 30?