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Hybrid Athlete or Hype at the CrossFit Games

  • Jul 21, 2026
  • 13 min

Show notes

What the episode covers

Can you get stronger and build endurance at the same time, or does one always undercut the other? Miles and Amara dig into the interference effect, the molecular tug-of-war between mTOR and AMPK that explains why heavy lifting and long cardio sessions sometimes work against each other.

Listeners will learn where the original 1980 research on this tradeoff came from, why doing strength work before cardio protects lifting gains, and how a six-hour gap rule, mileage caps, and block periodization turn this science into a workable weekly plan. The hosts also preview the 20th-anniversary CrossFit Games in San Jose as a live test of these same tradeoffs.

It's a full-spectrum look at balancing two demanding training goals without letting either one stall out.

Timeline

In this episode

7 moments worth skipping to. The timecodes match the player above.

  1. 0:00Introduction
  2. 1:23What Hurt This Week: The Training Check-In
  3. 3:06The Games Come Home: 20 Years of Fittest on Earth
  4. 5:09The Interference Effect: Old Myth, New Data
  5. 7:30From the Games Floor to Your Gym Floor
  6. 10:14Your Hybrid Game Plan (and What to Watch This Week)
  7. 12:14Outro

Quick answers

Straight from the episode

The questions this one settles, without the listen.

What is the interference effect in strength and endurance training?
The interference effect refers to the phenomenon where combining strength and endurance training can blunt each other's gains, rooted in a molecular tug-of-war between mTOR (which drives muscle growth) and AMPK (which drives endurance adaptations). Miles and Amara trace the concept back to the original 1980 Hickson study.
Does the order of lifting and cardio in a workout matter?
Yes. Miles and Amara agree that session order matters — lifting weights before doing cardio helps protect strength gains by minimizing the interference effect on the mTOR pathway.
How much rest should you leave between strength and cardio sessions to avoid interference?
The hosts discuss a six-hour gap rule, illustrated through Miles's friend Dave as a case study, as a practical way to space out strength and endurance sessions so they don't blunt each other's adaptations.
What is block periodization and how does it help hybrid athletes?
Block periodization means alternating training phases where either strength or endurance takes priority for a set period, rather than maximizing both simultaneously every week. Amara explains this as a way to manage the interference effect over time.
Do everyday athletes need Games-level training volume to get strong and fit?
No. Amara stresses that sustainable training beats maximal volume for most listeners, and the hosts argue everyday athletes don't need CrossFit Games-level volume to achieve solid strength and fitness results.
Why are the hosts excited about the 20th-anniversary CrossFit Games in San Jose?
Miles and Amara preview the Games returning to California for its 20th anniversary at the SAP Center, featuring restored quarterfinals, prize money, and a same-week Masters competition, framing the event as a real-world, high-stakes test of the strength-versus-endurance interference effect they discuss.

Transcript

The full conversation

Every word of the episode, 2,069 of them, in the order they were said.

Read the transcriptHide the transcript

MilesHey everyone, welcome back to Full Spectrum Fit.

AmaraGrab your coffee because Miles is walking a little funny today.

MilesYeah, yeah, heavy deadlift day yesterday, then I coached three sessions on top of it. My hamstrings are staging a protest.

AmaraNoted. Meanwhile, I actually fixed something in my swing this week, shifted my hip hinge timing, and my lower back finally stopped barking at me.

MilesWait, the swing was the culprit the whole time?

AmaraPretty much. Small fix, huge difference.

MilesThat's actually perfect, because today we're circling something a lot bigger: the interference effect. Why lifting and cardio sometimes fight each other inside your own body.

AmaraAnd whether elite athletes have actually figured out a workaround or if they're just suffering more efficiently.

MilesOne theory.

AmaraOkay, so get this. We're also previewing the CrossFit Games. 20th anniversary and they're bringing it back to California.

MilesSan Jose, the SAP Center. According to CrossFit, the Games run this July.

AmaraAnd that whole event is basically a live experiment in everything we're about to talk about. Strength versus endurance under pressure.

MilesExactly the tension Dave's been dealing with in his training, by the way. We'll get to him.

AmaraOh, Dave's getting called out again?

MilesAlways. All right. Sore hamstrings and all, let's start with the check-in. Check in.

AmaraMiles, tell everyone how the deadlifts actually went.

MilesOkay, so my hamstrings are staging a full protest right now.

AmaraWhat'd you do?

MilesDeadlifted heavier than I should have on Tuesday, then coached a class right after. Bad combo.

AmaraClassic do as I say, not as I lift.

MilesExactly. But it's got me thinking about interference. Lifting heavy then stocking cardio volume right on top.

AmaraOoh, hold that thought. My week was way less dramatic.

MilesWhat'd you find?

AmaraI finally fixed my hip hinge on kettlebell swings. One cue, shift the weight back, and my lower back stopped complaining for the first time in weeks.

MilesThat's the win nobody posts about.

AmaraRight. No PR, no confetti, just less pain.

MilesI'll take a boring win over a busted hip any day.

AmaraSame. But back to your interference thing, that tension's real. Strength adaptations and endurance adaptations can compete for the same cellular signals.

MilesWhich is basically my whole week. Heavy pull, then a five-mile shakeout run the next morning. I know, I know.

AmaraNo wonder you're shuffling around the gym.

MilesI'm not limping. I'm strategically pacing myself. myself.

AmaraSure. Okay, get this. This week, 20 years worth of athletes face that exact trade-off, except with zero warning.

MilesWait, what do you mean zero warning?

AmaraThe CrossFit Games. They don't find out the workouts ahead of time. Heavy lifts, gymnastics, long runs, all thrown at them cold.

MilesHa, if you and I feel wrecked just planning our own week.

AmaraImagine doing it blind on a stage for a title. Title

MilesNow I actually want to know how they survived that. So the Games turning 20 got me digging through old notebooks. I covered the very first one back in '07 out in a field in Aromas.

AmaraWait, an actual field? Not an arena?

MilesA field. Hay bales, a truck bed for a stage, and now they're headed to the SAP Center in San Jose. The Sharks rink. 17,000 seats. They call it the Shark Tank.

AmaraCrossFit's own site has the dates locked for July 24th. Through the 26th,

MilesMm-hmm.

Amara20th anniversary, back in California where it all started.

MilesFull circle, from hay bales to a hockey arena.

AmaraAnd get this, quarterfinals are back. Wikipedia's page on the 2026 season notes they got cut in 2025, and now they're restored.

MilesOh, that's huge for the mid-pack athletes. More rounds means more chances to actually make the cut.

AmaraPlus, the money's real. Athletech News has the individual champs walking away with $312,000 each this year.

MilesWhistles for three days of work? Sure, but nobody's walking in under-trained.

AmaraAnd it's not just the elites that week. The Games' own division schedule has Masters athletes competing July 21st through 23rd, same city, same stretch of days.

MilesEvery age group, one roof. That's kind of wild when you think about it.

AmaraRight? Grandmothers and twenty-two year olds under the same lights!

MilesHere's what gets me, though: none of them know the work-outs ahead of time.

AmaraRight.

MilesCould be a max deadlift Friday morning, a 5k Friday afternoon.

AmaraSo it's basically an involuntary science experiment. Strength, gymnastics, endurance, stacked. No warning, no recovery day.

MilesExactly the tension we were just chewing on with our own training.

AmaraExcept they can't just blame it on bad hip hinge form.

MilesLow blow.

AmaraSo if these athletes can build strength and endurance at the same time, what does that actually tell the rest of us about training both?

MilesThat's the real question the research has to answer.

AmaraShifting into the research, this idea goes back to 1980, a study by a guy named Hickson.

MilesThe original culprit.

AmaraHe had lifters add running onto their squat program. Ten weeks in, their squat gains stalled while the strength-only group kept climbing.

MilesForty plus years old though, programming's come a long way since then.

AmaraThat's actually the reviewer's point, too. A 2024 review, titled The Interference Effect is Dead, looked back at 15 years of concurrent training research.

MilesDead? That's a bold headline.

AmaraThey found the effect shows up when programming is sloppy, basically Hickson's setup, hard sessions stacked with zero thought, but it fades with deliberate programming.

MilesThat lines up with what I see on the floor. Guys who wing it, spin class Tuesday, deadlift Wednesday, murder Thursday, they plateau. The disciplined ones don't.

AmaraAnd there's a real mechanism for why sloppy stacking stacking punishes you specifically.

Speaker 3Lay it on me.

AmaraLifting heavy flips on a pathway called mTOR, the green light for building muscle protein.

Speaker 3mTOR, got it.

AmaraEndurance work flips on a different one, AMPK, which is about energy efficiency, not growth.

Speaker 3And they don't get along.

AmaraAMPK can suppress mTOR directly, molecular tug-of-war. Hit your legs with a hard run right after heavy squats? And you're fighting your own biology.

MilesSo my quads are literally at war with themselves.

AmaraPretty much. But timing changes who wins that fight.

MilesHow so?

AmaraSession order. Lift first, cardio second, and the strength signal gets a head start before AMPK even ramps up.

MilesThat's what the sharper coaches I know push: lift first, no exceptions.

AmaraFlip the order, cardio then lifting, and that's where research... Research points to the bigger strength hit.

MilesMake sense? Hence, you're pre-fatigued before you even touch the bar.

AmaraRight. So it's less about picking one discipline over the other.

MilesAnd more about sequencing it,

AmaraYeah.

Mileswhich honestly describes most hybrid athletes I've coached. Nobody's ordering their week on purpose.

AmaraGuilty of that myself before I started tracking this stuff.

MilesMy first real hybrid block was chaos. No order, no logic, just whatever felt hard that day.

AmaraWe've all been that person. So what's the actual week? weekly structure look like for someone who isn't trying to make San Jose?

MilesBuilding on that, let me tell you about my buddy Dave.

AmaraDave who deadlifts and also runs marathons for fun because

MilesThat's him. Used to lift at 6 a.m., then hammer a hard run at lunch. Squats stalled for a year.

Amarahis body never got a break between the two signals.

MilesExactly. So he changed one thing, the gap.

AmaraA piece from Find Your Edge on hybrid training this year found that leaving six or more hours between a hard lift and a hard conditioning session cuts down the interference effect.

MilesAnd not lines up with the mTOR and AMPK tug of war you laid out: six hours gives the strength signal room to finish before you flip the switch.

AmaraRight. Dave now lifts at six, runs after work.

MilesSquats up twenty pounds since spring.

AmaraNot bad for a scheduling fix.

MilesSecond piece, Miles. You can't run yourself into the ground and expect squats to hold.

AmaraThere's real guidance on this. The Athletech hybrid athlete guide puts the ceiling around three to four runs a week, 30 to 40 miles total, if you want to keep your strength and muscle.

MilesThat's a number people can actually plan around.

AmaraPast that mileage, fatigue starts eating into the recovery your lifts need.

MilesSo what about the weeks themselves? Everybody just try to max both every single week? Sure.

AmaraThat's the mistake. Ultrafit360 wrote about block periodization for exactly this: rotate a few weeks where strength is the priority and endurance gets held at a lower dose, then flip it.

MilesSo like three weeks heavy squat focus with easy jogs, then three weeks building the run back up while lifting drops to maintenance?

AmaraThat's the model, and the part that surprises people-you

MilesYou don't need much to hold on to strength.

Amarareally don't.

MilesWow.

AmaraBOXROX ran a piece this year saying strength holds with just one heavy session a week, as long as the intensity stays high.

MilesOne session-that's it?

AmaraOne, which is honestly the model most recreational hybrid lifters need. Nobody training for the Games has time for five squat days. Watt days and Marathon mileage.

MilesDave sure doesn't; he's got a nine to five and two kids.

AmaraSo translate it down; lift heavy once, maybe twice, at real intensity, cap the mileage, space the hard days apart, and rotate your focus every few weeks instead of chasing everything at once.

MilesA programme a normal person can actually run.

AmaraAnd now we get to watch the extreme version of all this play out live. Five.

MilesOh, I like where this is going. Okay, before we let you go, quick gut check on the whole plan.

AmaraThree moves. Lift first, guard the gap, cap the mileage. That's the whole protocol.

MilesAnd none of it requires Games-level volume. That's the part people miss.

AmaraRight, you don't need to run 50 miles a week to build real endurance. The dose-response research on hybrid training backs that up.

MilesDave's not chasing a podium. He's chasing not falling apart at 42.

AmaraExactly. Sustainable beats maximal for almost everyone listening.

MilesSo here's your homework this week. Pick one lift day, one endurance day, six hours apart minimum.

AmaraAnd write down your mileage before you start adding it up in your head after the fact.

MilesSpeaking of maximal, the actual Games are basically running our experiment for us.

AmaraOh, I love this. Live interference effect data, 20,000 fans watching.

MilesSAP Center, San Jose, July 24th through the 26th, 20th anniversary.

AmaraAnd with quarterfinals back this year, we get more athletes, more variants, more chances to watch someone's strength or endurance crack under the exact tradeoff we just spent 40 minutes on.

MilesThat's what I'll be watching for. Who fades on event three after crushing a max lift the day before?

AmaraYou're going to be taking notes during a live stream, aren't you?

MilesGuilty every time.

AmaraWatch the workout order they announce. If cardio comes right after a heavy strength piece, that's the tug of war we talked about, live, on camera.

MilesAnd if someone still pulls it off, that tells you something about training age, not magic.

AmaraGenetics help, but the protocol is what gets normal people most of the way there.

MilesSo here's the challenge. This week, run the three rules. Gap your sessions. Cap your miles. Lift heavy once.

AmaraThen watch San Jose and see the same principles under lights.

MilesSee who breaks first, strength or lungs.

AmaraMy money's on lungs, event three, day two.

MilesWe'll settle that next week.

AmaraOkay, so if you take one thing from today, it's this: session order matters more than most people think.

MilesLift before you run, not after. That's the whole protocol, really.

AmaraRight. And hey, my hips say thank you for that swing fix.

MilesMine still remember Tuesday's deadlifts.

AmaraNever coach right after heavy pulls again.

MilesLesson learned. But honestly, watching San Jose this week is going to hit different now.

AmaraOh, completely. Twenty years of athletes making that exact strength versus endurance call live under lights.

MilesNo warm-up, no do-over. That's the real stress test.

AmaraExactly. All right. If you've got a training blind spot you want us to tackle.

MilesDrop it in the reviews or tag us at Full Spectrum Fit.

AmaraNew episodes every Tuesday. Thanks for training with us today.

MilesGo hit your lifts, save the Miles later. See you next week.

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