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The Dr. Gabrielle Lyon Show

The Dr. Gabrielle Lyon Show

HIIT vs. Moderate Intensity Exercise - Which Is Better for Your Health? | Dr. Martin Gibala

Mar 17, 2026 · 1 hr 47 min · 22 segments

Metabolic flexibility is your body’s ability to efficiently burn fat or carbohydrate depending on demand, may be one of the most important and least understood markers of long-term health. In this…

Metabolic flexibility is your body’s ability to efficiently burn fat or carbohydrate depending on demand, may be one of the most important and least understood markers of long-term health. In this episode, I’m with Dr. Martin Gibala to explore the emerging science of Fat Max, why mitochondrial quality is central to both performance and longevity, and how sprint interval training produces comparable mitochondrial adaptations to traditional endurance work in a fraction of the time. Could the key to better metabolic health be less about the hours you log and more about how hard you’re willing to push?<...

Metabolic flexibility is your body’s ability to efficiently burn fat or carbohydrate depending on demand, may be one of the most important and least understood markers of long-term health. In this…

Speakers: Martin GibalaGuestGabrielle LyonHost

Show signals: PopularityVery Populartop 5%

Top entities: High-intensity interval training×34 Sitting×12 Rating of perceived exertion×9 Mitochondrion×3 Exercise

Teaser: Why vigorous training and HIIT matter0:00 – 1:25

M

Martin GibalaGuest

0:00

So many people are struggling to meet the physical activity guidelines.

M

Martin GibalaGuest

0:04

We should all be doing about 150 minutes a week of moderate to vigorous physical activity intensity.

G

Gabrielle LyonHost

0:10

People struggle with time.

G

Gabrielle LyonHost

0:11

So where would that be acceptable?

M

Martin GibalaGuest

0:13

There's a number of people, where you give them the option, an hour of traditional continuous, or you can do 10 minutes of really vigorous, which do you like? I really don't like that sprint training in the moment, but I certainly like it when I'm done in 10 or 15 minutes, and I would much prefer that to doing an hour or 90 minutes of the traditional approach.

M

Martin GibalaGuest

0:33

The studies also show that more vigorous physical activity will lead to greater improvements in VO2 max, and that's not only in healthy individuals.

M

Martin GibalaGuest

0:44

This is in individuals with many different chronic conditions.

G

Gabrielle LyonHost

0:48

Talk to me about where high-intensity interval training could be applied to the regular person.

M

Martin GibalaGuest

0:56

It all comes back down to, do you have metabolic flexibility or not? One of the best ways to improve that is to boost your mitochondrial capacity, right? Boost your health.

G

Gabrielle LyonHost

1:05

We're entering a new era where people are very interested in-

M

Martin GibalaGuest

1:08

Yeah

G

Gabrielle LyonHost

1:08

... female-specific exercise.

G

Gabrielle LyonHost

1:10

Are there some differences?

M

Martin GibalaGuest

1:12

There might be some subtle differences there, but overwhelmingly, it's [gentle music]

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High-intensity interval trainingEntity
98%34 mentions
SittingEntity
94%12 mentions
Rating of perceived exertionEntity
90%9 mentions
MitochondrionEntityGene group
87%3 mentions
ExerciseEntity
83%1 mention
VO2 maxEntity
79%18 mentions
MuscleEntity
75%1 mention
Randomized controlled trialEntity
71%2 mentions
American College of Sports MedicineCollege or UniversityCollege in Indianapolis, Indiana
67%4 mentions
AMP-activated protein kinaseEntity
63%7 mentions
Stuart M PhillipsPersonResearcher
60%2 mentions
World Health OrganizationCompanyIntergovernmental organization
56%1 mention
patient complianceEntity
52%1 mention
Brain-derived neurotrophic factorEntity
48%1 mention
PPARG coactivator 1 alphaEntityProtein
44%1 mention
The WhoMusic GroupRock band
40%3 mentions
LionEntityMammal
37%2 mentions
Tabata protocolEntity
33%1 mention
Revolutions per minuteEntityUnit of angular frequency
29%2 mentions
Four Sigma Foods, Inc.CompanyCompany
25%2 mentions
Adenosine triphosphateEntityCompound
21%1 mention
AustraliaCountryCountry in Oceania
15%1 mention
Emmanuel StamatakisPersonResearcher
15%1 mention
Target CorporationCompanyRetailer corporation
10%1 mention
Whole Foods MarketEntity
6%1 mention
Hemoglobin A1CEntityChemical compound
2%1 mention

DiabetesHealth > Chronic Conditions
AgingHealth
Dietary GuidelinesHealth > Nutrition
FitnessHealth
ExerciseHealth > Fitness
NutritionHealth
High-Intensity Interval TrainingHealth > Fitness > Exercise
Chronic ConditionsHealth
MetabolismHealth > Physiology
Health OutcomesHealth > Fitness > Exercise > High-Intensity Interval Training
VO2 MaxHealth > Physiology > Metabolism
Exercise PhysiologyHealth > Physiology > Metabolism > VO2 Max
Metabolic FlexibilityHealth > Nutrition > Dietary Guidelines > Carbohydrate Intake
Exercise PrescriptionHealth > Chronic Conditions > Diabetes
Health BenefitsHealth > Chronic Conditions > Diabetes > Exercise Prescription
Resistance TrainingHealth > Aging > Sarcopenia
Muscle HealthHealth > Aging > Sarcopenia > Resistance Training
SarcopeniaHealth > Aging
Health
Carbohydrate IntakeHealth > Nutrition > Dietary Guidelines
PhysiologyHealth

Teaser: Why vigorous training and HIIT matter0:00 – 1:25

M

Martin GibalaGuest

0:00

So many people are struggling to meet the physical activity guidelines.

M

Martin GibalaGuest

0:04

We should all be doing about 150 minutes a week of moderate to vigorous physical activity intensity.

G

Gabrielle LyonHost

0:10

People struggle with time.

G

Gabrielle LyonHost

0:11

So where would that be acceptable?

M

Martin GibalaGuest

0:13

There's a number of people, where you give them the option, an hour of traditional continuous, or you can do 10 minutes of really vigorous, which do you like? I really don't like that sprint training in the moment, but I certainly like it when I'm done in 10 or 15 minutes, and I would much prefer that to doing an hour or 90 minutes of the traditional approach.

M

Martin GibalaGuest

0:33

The studies also show that more vigorous physical activity will lead to greater improvements in VO2 max, and that's not only in healthy individuals.

M

Martin GibalaGuest

0:44

This is in individuals with many different chronic conditions.

G

Gabrielle LyonHost

0:48

Talk to me about where high-intensity interval training could be applied to the regular person.

M

Martin GibalaGuest

0:56

It all comes back down to, do you have metabolic flexibility or not? One of the best ways to improve that is to boost your mitochondrial capacity, right? Boost your health.

G

Gabrielle LyonHost

1:05

We're entering a new era where people are very interested in-

M

Martin GibalaGuest

1:08

Yeah

G

Gabrielle LyonHost

1:08

... female-specific exercise.

G

Gabrielle LyonHost

1:10

Are there some differences?

M

Martin GibalaGuest

1:12

There might be some subtle differences there, but overwhelmingly, it's [gentle music]