Your Pasta Dinner Is 36 Hours Late

MilesHey, everyone. Welcome back to Full Spectrum Fit.

AmaraAnd oh man, do we have a rough long run to talk about today.

MilesThat would be me. Eighteen miles on the calendar and I fell apart at mile fourteen.

AmaraLegs or stomach?

MilesStomach. Cramping, bloated, just done.

AmaraMm-hmm.

MilesFelt great right up until then.

AmaraSure, but the mistake wasn't at mile fourteen. It started way earlier than that gel you grabbed.

MilesWait, really?

AmaraReally. It's got everything to do with what you ate the night before.

MilesThe pasta dinner?

AmaraThe sacred pasta dinner, every runner's pre-race ritual.

MilesFive and a half weeks out from Berlin, and you'd be surprised how little that dinner actually does on race morning.

AmaraOkay, so get this. We're digging into the gram targets for carb loading.

MilesWow.

AmaraThere's a real number, and most runners land nowhere close.

MilesThen we get into how your gut absorbs all that-

AmaraRight

Miles... sugar. Apparently, there's a whole system for it I never learned.

AmaraPlus, a two-week gut training protocol you could start this week-

MilesYeah

Amara... and a full map of the five weeks to race day.

MilesWhich in hindsight might have saved me at mile fourteen.

AmaraLittle late for you. Perfect timing for everyone listening.

MilesSo let's start where every disaster run starts.

AmaraThe check-in. What actually happened out there?

MilesSo Sunday, twenty-mile long run and mile fourteen, I basically hit a wall shaped like a bagel.

AmaraA bagel wall. Please explain.

MilesI grabbed a gel at round ten, felt great, then just nothing. Legs turned to sand by minute ninety.

AmaraSo you under-fueled and now you're blaming physics.

MilesMaybe a little, but it got me thinking about race week because Berlin's real now.

AmaraHow real?

MilesSeptember twenty-seventh. That's about five and a half weeks out.

AmaraMm-hmm. Five and a half? Okay, that's not far.

MilesAnd Chicago and New York are stocked right behind it for a lot of our listeners.

AmaraWhich means decisions about race week are happening right now, not in September.

MilesExactly. And the one decision everybody thinks they've already made-

AmaraThe big pasta dinner the night before

Miles... the ritual, candles, garlic bread, a mountain of spaghetti with the whole team.

AmaraI love that dinner. Socially, it's great. Physiologically?

MilesYou've got to look.

AmaraI've got research. That one dinner is doing almost no glycogen work, and I can prove it with grams.

MilesWow. One dinner, huh? My legs at mile fourteen would like a word.

AmaraYour legs weren't failed by garlic bread. They were failed way earlier than that.

MilesHow early are we talking?

AmaraDays early. That's the whole argument I want to make.

MilesAll right, all right. Hold that thought, though, because I want to know something first.

AmaraGo.

MilesIf the pasta dinner isn't doing the work everyone thinks it's doing, what's actually filling that tank? Ah.

AmaraBuilding on that pasta myth, let's talk actual grams. Burke's twenty eleven review and the ACSM position from twenty sixteen put marathon loading at eight to twelve grams of carb per kilo of body weight per day.

MilesOof, okay. That's a big range. I've coached guys from fifty-five kilos to eighty-five. Walk me through what that means for, say, a seventy-kilo runner.

AmaraFind Your Edge ran the exact math in their race week guide, five-sixty to eight-hundred and forty grams a day for thirty-six to forty-eight hours before the gun.

MilesWait, wait, wait. Eight-hundred and forty grams? That's like six loaves of bread.

AmaraBasically, yeah. And here's what's wild. The old depletion phase thing, starve yourself Monday, binge Thursday, Findyouredge notes that's obsolete. You hit the same glycogen ceiling with just a taper and a high-carb window. No misery week required. Good riddance.

MilesI did the depletion week once in twenty-fourteen. Cried in a Trader Joes. That checks out.

AmaraBut here's the actual failure point for most recreational runners. It's not overdoing it, it's undereating. How under?

MilesI see so many runners landing around four to five grams per

Amarakilo when the target's double that. That tracks with what I see coaching.

MilesGuys think one big spaghetti dinner is the whole protocol. Right.

AmaraAnd a single pasta serving is maybe two hundred grams of carbs, so even a heroic bowl gets you a quarter of the way so even a heroic bowl gets you a quarter of the way there.

MilesSo the guy loading up at the Italian place Friday night before Berlin is- ... basically snacking.

AmaraPretty much.

MilesOkay, but Amara, I want to push on the real world side here. You tell a nervous taper crazy runner to eat eight-hundred grams of carbs and they look at you like you just asked them to eat a couch.

AmaraFair.

MilesFull stomach two days out, some GI dread already creeping in. That's a lot of solid food to force down.

AmaraSo spread it out. You don't need three giant meals. Five or six smaller feedings across the day gets you there without the stuffed feeling.

MilesThat's what I actually tell people. Add liquid carbs, sports drink, juice, even a carb-heavy smoothie alongside the rice and potatoes. Way easier to get down than another plate of penne.

AmaraExactly. And liquid carbs digest faster, so less sitting in your stomach panic the night before.

MilesAnd I've watched runners hit their number just by sipping a bottle of Gatorade throughout the afternoon instead of forcing a fourth dinner roll.

AmaraAnd that's the version people can actually stick to for two full days, not just one dinner.

MilesNot just one dinner. So we've topped off the tank. Feels good going in. Then mile eighteen comes calling.

AmaraSure, until mile eighteen burns through every gram of it.

MilesWhich is the real question, isn't it? Loading gets you to the start line full. What happens once you're actually running is a whole different system.

AmaraA system with its own ceiling, actually, and that's worth breaking down.

MilesOkay, so the tank's full. Now the question is how fast can you actually burn it going in?

AmaraRight. Because on that twenty-miler, I wasn't short on carbs in my stomach, I just couldn't get them into my legs.

MilesThat's the transporter problem. Your gut has a doorway called SGLT1, and it only lets glucose through at about sixty grams an hour max.

Amara60? That's it? That's basically one gel every 20 minutes.

MilesExactly. And for decades, that number was treated like a hard ceiling. But there's a second doorway, GLUT5, and it only opens for fructose.

AmaraSo two doors, two keys.

MilesRight. Glucose alone, you're stuck at 60. Glucose plus fructose together, you're running both doors at once.

AmaraAnd that's how people get to 90, 100 grams an hour.

MilesA 2022 study led by Harris had trained cyclists absorbing 120 grams an hour for three hours near lactate threshold-

AmaraWow

Miles... with minimal stomach trouble.

Amara120. Okay, that's wild. But cyclists aren't marathoners bouncing every stride.

MilesFair. And your gut tolerance is genuinely individual, so treat that number as a ceiling researchers found possible, not a target for Sunday.

AmaraSo how does a normal person actually shop for this? Because I've got three gels in my cabinet.

MilesRight now, flip one over, check the ingredients.

AmaraIf it's just maltodextrin or glucose syrup, you're capped at that old 60-gram doorway no matter how many you eat.

MilesRight. You're just backing up traffic at one door.

AmaraBut if I see sucrose on the label, like actual table sugar, that's glucose and fructose in a one-to-one ratio. Both doors open automatically.

MilesThat's the tell. A lot of the newer race gels blend maltodextrin with fructose specifically to hit that ratio.

AmaraSo next time I'm standing in the running store like a lawyer reading fine print.

MilesBasically, yeah. And here's the part that surprised me. More sugar can mean fewer symptoms, not more.

AmaraWait, that seems backwards.

MilesThink about it. If you're only using one door, the unabsorbed sugar just sits in your intestine, pulling water in, fermenting. That's your cramping and bloating.

AmaraOh, so opening the second door actually clears traffic instead of adding more cars.

MilesExactly that. Okay, but I want the honest number here, not the lab number.

Amara90 grams an hour is the realistic zone for most recreational marathoners. 120 is what elite gut-trained athletes can handle. It's not automatic just because the doorway exists.

MilesOkay, so don't walk into Berlin trying to hit the cyclist number.

AmaraNo. And honestly, even 90 takes practice. You can't just decide race morning that your gut handles that volume.

MilesWhich brings up the obvious question, how do you actually train a gut?

AmaraFunny you ask. That's a real trainable system, not something you're just born with.

MilesI did not know stomachs went to the gym.

AmaraThey do, and there's a protocol.

MilesBuilding on that gel math, none of it matters if your stomach's not ready for the volume. I learned that the hard way.

AmaraRight. Absorption capacity on paper is useless if you're doubled over at mile 10.

MilesWhich is where gut training comes in. You actually train the intestine like you'd train a muscle.

AmaraThere's a 2023 systematic review published in PMC that looked at exactly that, two weeks of training at 30 to 90 grams an hour.

MilesAnd?

AmaraRoughly 47% less gut discomfort, 54% less malabsorption.

MilesWow. From two weeks?

AmaraThat's the finding, but small study population, worth saying up front. Your mileage may genuinely vary here.

MilesFair. Here's how I'd build it, though. Start where you're already solid. Don't be a hero and jump 50 grams overnight.

AmaraSo if you're fine at 40 grams an hour right now-

MilesYou add five, maybe 10 grams next long run, not 50. I learned that one the hard way.

AmaraOh, here we go.

MilesTraining run, I jumped from 40 to 90 overnight, stuffed three gels in my shorts like I was stalking a vending machine.

AmaraAnd?

MilesMade it four miles before sprinting for a gas station bathroom. Not my finest hour.

AmaraThat's overload training, not an overload assault.

MilesExactly the lesson. Small jumps every long run, same direction.

AmaraAnd it's not just volume. Tolerance drops in heat, and it drops at goal pace versus easy pace.

MilesSo practicing your carb intake on a lazy Sunday jog tells you almost nothing about race day conditions. Heat, pace, fatigue, everything changes.

AmaraYou've got to rehearse at goal pace. That's the only data that actually transfers.

MilesWhich brings up a math problem. Two weeks is the floor for this adaptation, not the finish line. You need time to actually confirm it works.

AmaraBerlin's five and a half weeks out.

MilesSo if someone starts gut training three weeks before the race-

AmaraThey're adapting during taper when the training stress already dropped off

MilesWhich kind of defeats the point. You're adapting while your training is already dialed back. That's backwards.

AmaraExactly why this starts now. Tonight, honestly, go check whatever gel is sitting in your cabinet.

MilesAnd if you're pushing new volume for the first time, do it on a training run where failure doesn't derail your race week. Never on the actual course in September.

AmaraOld rules, still true. No new products on race day.

MilesSo walking away, start where you tolerate, add 10 grams max per session, rehearse at goal pace. That's the protocol.

AmaraAnd give it the full two weeks minimum.

MilesWhich means we need to actually map this against Berlin's calendar next.

AmaraBecause two weeks of gut training buried inside taper doesn't help anybody.

MilesBuilding on that, let's put dates on the calendar.

AmaraOkay. Spreadsheet brain, go.

MilesBerlin's September 27th. Count back five weeks. That's today, not next week. This week is where it starts.

AmaraTwo weeks of overload, then a rehearsal long run where you eat exactly what you'll eat on race morning.

MilesMm-hmm.

AmaraNot a new gel, not a new flavor.

MilesDress rehearsal, not opening night.

AmaraThen 48 hours out, you shift from gut training into the full load. Same daily target we mentioned spread across meals, not one big dinner.

MilesAnd race morning itself, what's the actual number?

AmaraScience and Sports Guide points to roughly one to two grams of carbs per kilo eaten three to four hours before the gun, anything you've already tested.

MilesSo if you haven't tried it on a training run, it doesn't touch your plate that morning.

AmaraExactly. And one thing people miss, cut fiber way down that final day or two. Beans, bran, raw veggies, they sit in your gut and cause trouble mid-race.

MilesLearned that one the hard way with a bran muffin. Never again.

AmaraOf course you did. Keep fat low too, so the carbs actually get absorbed instead of fighting for space.

MilesBefore we go, there's a flip side to all this carb loading talk.

AmaraYeah. If you're chronically undereating in normal training, this isn't carb loading. This is digging out of a hole.

MilesThat's RED-S territory, and it's its own conversation.

AmaraProbably a whole episode.

MilesFor now, here's my one thing to write on the calendar. Start gut training this week, not after some magic taper switch flips and suddenly your training disappears.

AmaraMine's the rehearsal run. Whatever you eat on that dress rehearsal long run is what goes in your body on September 27th. No surprises.

MilesDeal. Write it down right now before taper gets in your head and convinces you it's too late to train anything new.

AmaraFor now, carb periodization's still waiting for us.

MilesSo that bagel wall from mile 14, it turns out the fix started way earlier than the gel.

AmaraRight, the pasta dinner myth. One plate was never going to carry you.

MilesExactly. So the real takeaway today-

AmaraTrain your gut like you train your legs. Start now and not during taper

MilesAnd spread the carbs out, liquid, solid, whatever actually gets the grams in.

AmaraFive and a half weeks to Berlin. That's plenty of time to fix this.

MilesGot a fitness blind spot you want us to cover? Drop it in the reviews or tag us at Full Spectrum Fit.

AmaraNew episodes every Tuesday. Come back and tell us how the rehearsal long run goes.

MilesThanks for hanging with us today.

AmaraSmile. Go eat your carbs. We'll see you next week