𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲

ᴛʜᴇ Sᴄɪᴇɴᴄᴇ ᴀɴᴅ ᴀᴘᴘʟɪᴄᴀᴛɪᴏɴ ᴏf ʜɪɢʜ-ɪɴᴛᴇɴsɪᴛʏ ɪɴᴛᴇʀᴠᴀʟ ᴛʀᴀɪɴɪɴɢ (#HIITScience). Sᴏʟᴠɪɴɢ ᴛʜᴇ ᴘᴜᴢᴢʟᴇ!

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

Pre-exercise protein before an easy ride?

Dr. Jeff (@EatsleepfitJeff) explains that pre-exercise protein may allow athletes to maintain fat oxidation during an easy ride while still giving the body some fuel.

Listen here on Spotify: https://t.co/gPhBJLTMJT

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

@ProfTimNoakes explains how muscle glycogen, insulin levels, and fat oxidation interact, and why low insulin may be essential for athletes who want to better access fat as fuel.

Watch the episode on YouTube: https://t.co/kZYhYr5s82

@DrPhilMaffetone @PaulBLaursen @Athletica_AI

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

What truly limits endurance performance: the brain, the muscles, or both?

Dr. Marius and Dr. Paul discuss how muscular function, fatigue, and central regulation shape performance.

Full episode: https://t.co/2eG11aX5Cl
@ProfTimNoakes @LoreofRunning1 @PaulBLaursen @Athletica_AI

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

What limited ProTour performance, and when?

Athletica's System Engagement estimates the metabolic bottleneck from power output.

Want to know how? Full case study: https://t.co/UOzJ2Ogo82

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

In this clip from the Training Science Podcast, Lawrence van Lingen shares a story that might shift how you think about stress, sleep, and blood sugar.

Listen to the full episode:

▶️ https://t.co/Yc7Sr7bu2o

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

Your breathing changes the moment you stop lying down.

Lawrence Van Lingen explains: crawling rewires how your shoulders, hips, core, and breath work together when you're upright and moving.

Listen to the full episode on the Training Science Podcast:
▶️ https://t.co/ZK6EzVosXy

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

Racing more doesn't always mean performing better.

Pro cycling shows it: rest > grinding.

Training camps. Recovery. Heat. Altitude. All year.

🎙️ Dr. @BaileyDM on the Training Science Podcast.

Listen on Spotify: https://t.co/NIqR06Un90
Listen on Apple: https://t.co/CUaAQ0LJiG

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

Your HRV score matters... but its stability matters even more.

@DrGregGrosicki breaks down how HRV variability (CV) reveals whether your recovery has actually been consistent over the past week.

Training Science Podcast → https://t.co/VIZ1ksrc1A

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

Your HRV score matters... but its stability matters even more.

@DrGregGrosicki breaks down how HRV variability (CV) reveals whether your recovery has actually been consistent over the past week.

Training Science Podcast → https://t.co/VIZ1ksrc1A

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

We glorify Zones 4 and 5.

But your heart might not care.

Low-intensity, longer duration work in Zones 1 and 2 drives the most cardiac adaptation... not the hard stuff.
@guido_claessen @PaulBLaursen
-
📄 Dausin et al., European Heart Journal (2026)
-
🎙️ https://t.co/rm9CqHz5G7

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

Are fatigability & durability different?

🔹 Fatigability = max force decline
🔹 Durability = performance decline over time

Extend fatigability to power over time… and durability's already captured.

Professor Guillaume Millet @kinesiologui explains:
https://t.co/Q3a73W53oi

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

The recent Training Science Podcast episode with Dr. @AKoutnik sparked strong reactions.

Instead of debating in comments, we’re hosting a live, moderated Q&A inside our HIIT Science Community.

Not a debate. Not position-defending. Clarity.
Join us 👇
https://t.co/x8ZjMGbVOD

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

Dr. @AKoutnik and Dr. @PaulBLaursen unpack a key finding:

When hypoglycemia is controlled, both high-carb and keto athletes improved performance by ~22%.

Different diets. Same limiter: stable glucose prevents bonking.

Evidence over noise.

Full episode: https://t.co/CgoSz9vnqG

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

160+ studies. One pattern.

In 88% of cases, carbs improved performance by preventing blood glucose drops... not by adding more fuel.

- Dr. @AKoutnik & Dr. @PaulBLaursen

Full episode: https://t.co/CgoSz9vnqG

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

On the Training Science Podcast, Dr. @AKoutnik and Dr. @PaulBLaursen break down how low blood glucose drives fatigue.

When the brain senses hypoglycemia, it downregulates output to protect itself... and performance drops.

Full episode: https://t.co/CgoSz9uPB8

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

Recent research on fat oxidation and performance, including data showing 1.8 g/min fat oxidation in low-carb-adapted athletes.

Dr. @AKoutnik & Dr. @PaulBLaursen · Training Science Podcast

Full episode: https://t.co/CgoSz9vnqG

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

Dr. @AKoutnik & Dr. @PaulBLaursen discuss why science doesn’t advance by shouting people down, but by staying human while letting evidence speak.

Full episode: https://t.co/CgoSz9uPB8

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

Dr. @AKoutnik & Dr. Paul Laursen discuss the 30% of athletes who may be overlooking their metabolic health. Don’t assume your training volume protects you from everything. Full episode: https://t.co/3QKJ7R13rA

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

📈 The real challenge of blood glucose management for type 1 athletes

📊 Why continuous glucose monitors (CGMs) are changing the game

🥩 Carb strategies & fat oxidation: tailoring nutrition to the individual

🤖 How AI and tools like EnhanceD simplify complex diabetes data

[𝗛𝗜𝗜𝗧 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 @hiitscience]

💉🏃‍♂️ EXERCISE, GLUCOSE & PERFORMANCE — RETHINKING DIABETES MANAGEMENT ⚡

What happens when sports science meets blood sugar science?

Sam Scott joins Paul Laursen to unpack how exercise, nutrition, and technology collide in the quest to help people to thrive with diabetes.