Kiplimo's Chicago Crash and the Banking-Time Trap

MilesOkay, so my hamstring is still yelling at me from Tuesday's hill sprints.

AmaraYou said you were going to ease into those.

MilesI lied to myself, Amara. It happens.

AmaraWelcome to Full Spectrum Fit, where Miles injures himself weekly, and I judge him for it.

MilesFair. What about you? How'd the week go?

AmaraActually good. Long run felt smooth. Negative split without even trying.

MilesLook at you, practicing what we preach.

AmaraSomeone has to. Speaking of pacing.

MilesOh, here we go.

AmaraOkay, so get this. There's a guy who ran through thirty-five kilometers of a major marathon on pace to break the world record.

MilesWait, the actual world record?

AmaraThe actual one, and he didn't run his best time that day.

MilesHang on. How do you blow a world record pace and not even PR?

AmaraThat's the whole hook. We're gonna walk through exactly where it fell apart, split by split.

MilesOoh, receipts.

AmaraNumbers don't lie, Miles.

MilesThey also don't have hamstrings, unlike some of us.

AmaraTrue, but this one's got a real lesson in it for him and for anyone who's ever gone out too hot in a race.

MilesMeaning basically everyone listening right now.

AmaraMeaning basically everyone. So picture the start line in Chicago.

MilesOkay, so the guy at the center of this is Jacob Kiplimo. Chicago, this past October, and by thirty-five kilometers, he's on pace to break the marathon world record.

AmaraWait, the actual world record, not just fast?

MilesThe actual world record, and then it just comes apart. He still wins two hundred two, twenty-three, but that's minutes off what he was running.

AmaraOkay, that's a story right there. How do you blow up and still win by that much?

MilesBecause everyone else blew up worse. That's Chicago this year in one sentence.

AmaraBrutal. So how fast are we talking at the start? Because world record pace is doing a lot of work in that sentence.

MilesLetsRun had his opening 5K at thirteen fifty-eight.

AmaraThirteen fifty-eight for five kilometers. My brain doesn't even process that as a pace. That's just a number.

MilesIt's roughly two forty-eight a mile out of the gate in a marathon.

AmaraShut up.

MilesI'm serious.

AmaraNo, no, I heard you. I'm just picturing it. That's the pace you run when someone's chasing you, not when you've got twenty-six miles left.

MilesRight, but that's exactly the trap. It doesn't feel like 2:48 when you're that fit and the field's moving. It feels controlled.

AmaraOh, I know this move. This is banking time.

MilesSay more.

AmaraIt's the thing every recreational runner does too. You feel good in Mile 2. You're ahead of goal pace, and instead of thinking, "Uh-oh," you think, "Free money," like you're stacking up minutes in a savings account for when things get hard later.

MilesAnd Kiplimo did that at an Olympic level. Same instinct, way higher stakes.

AmaraWhich is almost comforting, like if the guy who's world-class at this still falls for it.

MilesThen it's not a discipline problem. It's a physiology problem, which is exactly where this gets useful for anybody listening who's got a race on the calendar.

AmaraLike, I did this at a half marathon two springs ago. Felt so smooth through mile four that I told myself I'd earned a cushion, and I just kept spending it.

MilesAnd that's the tell right there. I earned a cushion. That's the exact language of banking time. You're treating early comfort like proof instead of a temporary state.

AmaraWhich in hindsight is completely backwards because comfort at mile four in a half marathon means almost nothing about mile eleven.

MilesRight. Comfort early just means your effort matches your fitness for that moment. It says nothing about what's left in the tank once glycogen and heat and the rest start stacking up.

Speaker 3Suspicious of my own good mood. Great, more anxiety to bring to race day.

MilesNot anxiety, just data. Feeling great at mile four is one data point out of twenty-six miles worth.

Speaker 3So what would you actually tell someone in the moment, mile four, feeling amazing, before they even know if it's real?

MilesAsk what their effort feels like on a one to ten, not just what your watch says. If the number's climbing but your effort still reads easy, that gap is exactly what disappears late.

Speaker 3Okay, but I need the actual splits. Where does it start going wrong? Is it 20K, 25K? Does it just cliff at 35K?

MilesThat's the part worth slowing down for because it's not one moment. It's a slide, and once you see the numbers lined up next to each other, it's honestly kind of eerie.

Speaker 3Eerie how?

MilesLike, you can point to the exact kilometer where the wheels start to wobble before anyone watching would have noticed.

Speaker 3Okay, now I actually want the splits. Give them to me.

MilesThat's next. Let's line them up. Okay. World Athletics race report says he split 30K in one hundred twenty-five, thirty-one, the fastest 30K split ever recorded in a major marathon, and he was still on pace for something like two hours and six seconds.

AmaraWait, hold on. Fastest ever? Like ever, ever?

MilesEver. Nobody has run that fast to that point in a major marathon.

AmaraThat's insane. Okay, so at 30K, he's basically printing history.

MilesRight, and here's the turn. World Athletics has him reaching forty kilometers at one hundred fifty-five, ten, having drifted off world record schedule in that final 10K stretch.

AmaraSo from 30K to 40K, he loses the record.

MilesHe loses it, yeah.

AmaraHow much time exactly?

MilesEnough to hand it away, but that's the ten-kilometer average. The real damage is hiding inside one smaller window.

AmaraOkay, don't tease me. Where's it hiding?

MilesCITIUS Mag's breakdown has that 35K-to-40K split at fifteen seventeen.

AmaraFifteen seventeen for five kilometers? What was he running before that, like fourteen flat?

MilesUnder fourteen, easy, at his early pace.

AmaraSo in one 5K chunk, he loses over a minute.

MilesMore than a minute, and it's not a single bad patch either.

AmaraWhat do you mean?

MilesThe same piece lists his mile splits from twenty to twenty-six. Four thirty-two, four thirty-eight, four forty-six, four fifty, five oh five, then five twenty.

AmaraWait, wait. Read that last one again.

MilesFive twenty, mile twenty-six.

AmaraFrom 4:32 to 5:20, that's almost 50 seconds a mile gone, and it just keeps stacking.

MilesEvery mile a little worse than the one before it, no leveling off.

AmaraSo it's not a crash, it's a slow motion collapse with a start time.

MilesThat's a way to put it.

AmaraWhat's crazy is there's no plateau either. You'd almost expect him to hit a wall and then hold steady at some slower pace, but he doesn't.

MilesRight. Each mile is worse than the last all the way to the finish, 4:55 to 5:05 to 5:20. That's not stabilizing. That's still accelerating in the wrong direction.

AmaraSo even in mile 26, he's still losing time relative to mile 25.

MilesStill losing it. There's no moment where his body says, "Okay, this is the new normal. I can hold this." It just keeps bleeding until the finish line shows up.

AmaraThat's almost scarier than one catastrophic mile, honestly. A single blowup mile you could point to and say, "That's where it happened." This is just decay with no floor.

MilesWhich is exactly why looking at one split in isolation doesn't tell the story. You need the whole sequence lined up to see it.

AmaraOkay, so the shape isn't crash and recover, it's crash and keep crashing.

MilesBasically, yeah, right up until the tape.

AmaraMiles, I gotta say, watching that unfold live must have been brutal. You're rooting for the record, and it just erodes.

MilesI was checking splits like a maniac. You could see it happening kilometer by kilometer, and it never came back.

AmaraOkay, so we've got the shape now. World record pace through 30K, still ahead of schedule at 40K by a hair, and then six miles of steady bleeding.

MilesThat's the shape of it.

AmaraBut splits are just the scoreboard, right? They tell you what happened, not why his legs actually gave out at mile 22 and not mile 24.

MilesTrue.

AmaraMiles, what is actually happening inside his body at that speed after 20 miles that makes the wheels come off like that, and did he say anything himself about how the day felt from the inside?

MilesSo here's what's wild. Kibet talked to reporters after, and he said he didn't even realize he was inside world record schedule. Wait. Seriously? He didn't know?

AmaraThat's what he told the folks at A Mile A Minute. He said he was just racing the clock as hard as he could.

MilesSo the fastest marathoner on the planet that day was flying blind.

AmaraBasically, no internal alarm going off saying, "Hey, ease up."

MilesThat's the part that gets me. This is a guy with a resume most of us can't fathom, and his body still didn't send the memo in time.

AmaraRight, and the memo probably isn't really a feeling. One leading theory researchers point to is glycogen stores running low, which could explain why muscles stop firing the same way no matter how strong your mind is.

MilesAnd if that's what's going on, it's not gradual in the sense of a dimmer switch. It's more like the lights flicker fine, fine, fine, then suddenly you're in the dark.

AmaraWhich would explain why the fade shows up late instead of early, if that's really what's happening. Your legs are fine until they're catastrophically not fine.

MilesCatastrophically not fine. I'm putting that on a shirt.

AmaraDo it. But here's the thing that actually reframes this for me. There was a piece published days after the race by a writer named Toni Reavis, and the whole headline was basically asking, how fast is still too fast?

MilesOh, I like that framing.

AmaraHe used John Korir's title defense as the counterexample, the guy running the smart, controlled championship race instead of chasing a number.

MilesSo one guy's optimizing for the clock, the other's optimizing for the win.

AmaraWhich sounds like a small difference until you remember only one of them ends up limping across the line at 2:02.

MilesYeah. Korir's out there thinking about tactics, and Kibet's out there thinking about splits.

AmaraAnd that's really the whole argument in one comparison. Hold something back and you control the outcome. Spend it all early and the outcome controls you.

MilesWhich is a nice one-liner, but it's also just true.

AmaraAnd look, we don't know exactly what's happening inside his muscles minute to minute. Nobody wired him up with sensors on Michigan Avenue.

MilesSure.

AmaraBut the pattern is real, and it's common. Fast start, no perceived warning, sudden collapse. That's the shape elite pacing research keeps describing, even without a play-by-play of his physiology that day.

MilesSo he's not stupid. He's just human with a very, very good engine.

AmaraRight, and that's the trap. If he can't self-correct in real time once he's ahead of schedule, what hope do the rest of us have on a Tuesday night 10K?

MilesNone. Absolutely none. It's less about discipline and more about the fact that once you're past that red line, there's no talking your legs back into it.

AmaraSo it's not a willpower problem, it's a physics problem.

MilesBasically. Anyway, at least he can't blame the course for this one.

AmaraOh, here we go.

MilesI'm serious. Chicago's flat. It's fast. There's no Newton Hills waiting to wreck your quads at mile 20 like Boston. He doesn't get that excuse.

AmaraNo hills, no altitude, no excuses left standing.

MilesWhich means the next thing we've got to talk about is exactly that course and what the crowd was seeing in real time while all of this was unfolding. So here's the part that kills any excuse, Chicago's course profile.

AmaraOoh, elevation talk. Go.

MilesTotal elevation gain across the entire course is 187 feet. For a marathon, that's nothing.

AmaraWait, 187 feet over 26 miles?

MilesYeah. Picture walking up a 10-story building spread across three and a half hours of running.

AmaraThat's not a hill problem.

MilesIt's not a hill problem. There's no Heartbreak Hill in Chicago, no rolling section at mile 20 that ambushes you.

AmaraSo he can't say the course got him.

MilesHe can't. Flat, fast, built for records. That's literally why elites pick Chicago.

AmaraSo for someone training for, say, a flat local marathon, that's actually useful information. You can't blame the road either.

MilesExactly. If your course profile looks like Chicago's, whatever happens late is on your effort distribution, not the terrain.

AmaraWhich is almost more useful than a hilly course, actually. You don't get to hide behind terrain when you blow up.

MilesRight. Flat courses are honest that way. They tell you exactly how you paced, nothing else.

AmaraWhich means the fade was entirely a pacing decision.

Miles100%. No terrain to blame, no wind story, nothing.

AmaraOkay, but the internet noticed in real time, right? Because I feel like I saw chatter mid-race.

MilesOh, completely. Runners were watching the splits update live and arguing about it on LetsRun's message board while the race was still happening.

AmaraGosh, like actively debating whether he'd blow up mid-race?

MilesMid-race. People typing, "He's not going to hold this," before he'd even hit 30K.

AmaraThat's wild. A whole comment section calling the crash before it happened.

MilesAnd it wasn't just doomsaying either. Some of them were doing the math in real time, converting his splits into finish time projections mile by mile, basically running their own live commentary.

AmaraSo there's an entire parallel broadcast happening in a comment section while the actual broadcast is still going.

MilesPretty much. And when the fade actually showed up around 35K, you could watch the thread's tone shift in real time from, "Is he really doing this?" to, "Yep, called it."

AmaraThat's such a specific kind of internet schadenfreude. Not mean, just vindicated.

MilesAnd then afterward, it turned into the exact conversation we're having, was it brave or was it dumb?

AmaraBoth, probably.

MilesSure.

AmaraOkay, so turn this on us for a second because it's easy to watch an elite do this and feel superior.

MilesGo on.

AmaraWhat's your excuse when you fall apart at mile 20? Because most of us say it was the hills or the heat or the course was brutal.

MilesRight, and half the time the course was fine.

AmaraKiplimo just ran on the flattest big city marathon course there is and still cratered.

MilesSo if he can't blame terrain, none of us really can either.

AmaraThat's the uncomfortable mirror here.

MilesIt is.

AmaraSo next time you catch yourself reaching for an excuse, ask which kind it actually is, something the course did to you or something you did to yourself in the first three miles.

MilesBecause most of the time, if you're honest, it's the second one wearing a costume.

AmaraSo does he actually get a shot at redemption? Like, does he race again where we can watch whether he learned anything?

MilesHe does, actually, and soon.

AmaraOkay, tell me.

MilesHe's back October 11th, 2026, Chicago again.

AmaraWait, same race?

MilesSame race, stocked field.

AmaraOh, I need names.

MilesYou're getting them. Okay, so mark your calendar, October 11th, 2026, 48th Bank of America Chicago Marathon, and Kiplimo's defending.

AmaraSame course?

MilesSame course, much scarier field. Hawi faces back too, plus Kosgei and Lokedi on the women's side, and Hicks lining up as well.

AmaraHicks, the American?

MilesThat one.

AmaraSo this isn't some soft lap around the block to save face after last year.

MilesBank of America's own race announcement calls it one of the deepest fields ever assembled for the event.

AmaraWhiskey. All right, that's a statement field.

MilesHe's walking straight back into the exact conditions that will punish the mistake he made last time. No easing back in against a weak field to protect the ego.

AmaraHas anything actually changed for him physically, or is this just optimism talking?

MilesNot optimism. Since Chicago, he ran two hours zero-zero two-eight in London.

AmaraThat's quick, especially coming off a fade like that.

MilesAnd then he went and reclaimed the half-marathon world record, 57:20.

AmaraWait, after that mess, he broke a world record?

MilesSame organizer release, yeah. So whatever went sideways at kilometer 35, it wasn't his legs giving out.

AmaraRight. Nobody doubted the engine. The doubt was always about judgment, not fitness.

MilesExactly. Can he hold that speed for two hours, or does he go straight back to racing the clock and hoping his legs show up for the last 10 kilometers?

AmaraAnd honestly, we don't get an answer until he's actually standing on that starting line again.

MilesOctober 11th, not before.

AmaraI kind of love that, though. There's no hedging left for him. Deep field, flat course, and now a track record everyone will be watching split by split.

MilesBut here's the part I keep coming back to. You don't have to wait until October to test this on yourself.

AmaraRight. Your next race with a taper week is basically your own version of that starting line.

MilesWhatever feels effortless in the first couple miles-

AmaraAsk yourself honestly if you can hold it for the whole distance, not just brag about it at the five-mile mark

Miles... because that gap between what feels good early and what you can actually sustain is exactly what buried him in Chicago.

AmaraAnd it's the same gap that buries a weekend runner chasing a personal best off adrenaline.

MilesSo what do you actually do with that information heading into your next race?

AmaraThat's exactly where we're headed next, the real takeaway.

MilesSo here's what I want you to sit with. That fast split you're proud of at mile eight, it's not free money, it's a loan, and the back half of your race is the collections call every time, no exceptions.

AmaraKiplimo's the best runner alive, and he still got the call. What makes you think you're skipping the interest?

MilesRude. Accurate, but rude.

AmaraI'm allowed one mean truth an episode.

MilesFine. Here's mine, lighter version. Next time you feel amazing at the start, that's not a sign to push. That's just mile eight lying to you. It does that to everybody.

AmaraMile eight's a liar. Put it on a shirt.

MilesMaybe not.

AmaraAll right, homework time. Go look at your last race, find the split where you started negotiating, and tell us about it. Drop it in a review or tag us. We want to hear the blind spot.

MilesNew episode next Tuesday.

AmaraAnd maybe don't run the first half like the clock owes you something.

MilesThere it is.