J Physiol October 2001 PMID 11579177

The effects of increasing exercise intensity on muscle fuel utilisation in humans.

L J van Loon, P L Greenhaff, D Constantin-Teodosiu, W H Saris, A J Wagenmakers

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Mentions

57
Peak: 9 in Apr 2021
across 4 sources since Apr 2019

Extended reach

121,452
potential audience

Total likes

859

Video views

66,569

Mentions per month

Apr 2019 – Sep 2025

Where it's discussed

  • X / Twitter26 posts
  • News16 articles
  • Facebook11 posts
  • YouTube4 videos

AI synopsis

What people are saying

Several posts reference the core findings, such as the prominence of carbohydrate usage during high exercise intensities, with phrases like 'full breakdown' and mentions of 'muscle fuel utilization.' The tone varies from straightforward reporting to mild surprise, illustrating genuine interest, while some comments question or compare data, showing an overall engagement with the details. The choice of words like 'surprising' and 'main fuel source' reflects curiosity and recognition of the study's relevance, though there is no indication of the discussion perceiving it as a transformative breakthrough.

AgreementModerate agreement

Most participants seem to accept the findings, especially the idea that carbohydrates dominate as fuel during high intensities, although some express surprise at specific results.

InterestHigh interest

Discussions show high curiosity, with multiple posts referencing data and study details, indicating strong engagement with the research.

EngagementNeutral engagement

Posts mostly mention the study and related concepts rather than deeply analyzing or critiquing, suggesting moderate engagement.

ImpactModerate impact

While the discussion recognizes the relevance of the findings to exercise physiology, it does not seem to convey a sense of groundbreaking change or immediate application.

Abstract in brief

  • The study used stable isotope technology and muscle biopsies to investigate how muscle uses different fuels like fats and glucose during varying exercise intensities in cyclists.
  • As exercise intensity increased, muscle glycogen and blood glucose use rose, but overall fat burning peaked at moderate intensity and then dropped at the highest intensity, involving reductions in plasma FFA and triglyceride oxidation.
  • The decrease in fat oxidation at high intensity is likely due to reduced activity of carnitine palmitoyltransferase I, caused by lower free carnitine levels and changes in muscle pH, limiting fat breakdown during intense exercise.]

Top posts

Most liked on X and Bluesky
Jorn Trommelen, PhD
@JornTrommelen · X

Carbohydrates are the main fuel source during high exercise intensities. Full breakdown: https://t.co/lGm6WgQyRO Study: https://t.co/IFSDsfYXBr #carbs #fats #exercise https://t.co/VcQ5YA69Ij

Apr 2, 2021 · 39 likes · 8 shares · 7,619 followers View post →
ใบหม่อนจะเฮลตี้
@baimonxhealthy · X

แปะ ref ka https://t.co/AHUDHlwJk6 https://t.co/NzVQhZnfe6 https://t.co/UOfLhCliQD

Apr 3, 2024 · 22 likes · 17 shares · 32,698 followers View post →
Brett Singer MS,RD,CSSD
@BSinger10 · X

The effects of increasing exercise intensity on muscle fuel utilisation in humans from Luc van Loon #AMSSM19 https://t.co/H9AN8jwIbR

Apr 15, 2019 · 2 likes · 2 shares · 2,820 followers View post →
Nusrat Kausar
@NusratkRD · X

RT @Gonzalez_JT: Maybe its just me! But I find it surprising in light of data like this where glycogen is still a major contributor at low…

Dec 14, 2019 · 3 shares · 3,237 followers View post →
Shaun Scott
@upyrbike · X

RT @Gonzalez_JT: Maybe its just me! But I find it surprising in light of data like this where glycogen is still a major contributor at low…

Dec 14, 2019 · 3 shares · 1,436 followers View post →
Glenn McConell
@GlennMcConell1 · X

@LoreofRunning1 Luc Van Loon has similar data. https://t.co/f2SrbTdkBU

Jan 28, 2023 · 1,303 followers View post →

All mentions

p.29 ಥ⁠‿⁠ಥ
@portraitAR · X

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Apr 4, 2024 · 17 shares · 80 followers View post →
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@viviaannoo · X

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Apr 4, 2024 · 17 shares · 60 followers View post →
nothing but only me
@nbsgdpch · X

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Apr 3, 2024 · 17 shares · 121 followers View post →
Meveole
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Apr 3, 2024 · 17 shares · 22 followers View post →
aikqueSUNG
@aikquesung · X

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Apr 3, 2024 · 17 shares · 936 followers View post →
Ellamora
@GL_221B · X

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Apr 3, 2024 · 17 shares · 31 followers View post →
punnattanan_|||♡
@punnattanan · X

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Apr 3, 2024 · 17 shares · 61 followers View post →
TheLittleKit lll
@TheLitt35335228 · X

RT @baimonxhealthy: แปะ ref ka https://t.co/AHUDHlwJk6 https://t.co/NzVQhZnfe6 https://t.co/UOfLhCliQD

Apr 3, 2024 · 17 shares · 187 followers View post →
ใบหม่อนจะเฮลตี้
@baimonxhealthy · X

แปะ ref ka https://t.co/AHUDHlwJk6 https://t.co/NzVQhZnfe6 https://t.co/UOfLhCliQD

Apr 3, 2024 · 22 likes · 17 shares · 32,698 followers View post →
Glenn McConell
@GlennMcConell1 · X

@LoreofRunning1 Luc Van Loon has similar data. https://t.co/f2SrbTdkBU

Jan 28, 2023 · 1,303 followers View post →
【図解】W.K【ワークアウトノウレッジ】
@rDu0g2LNL2fQByB · X

論文はこちらになります。 https://t.co/OJYSFbNIGr

May 2, 2021 · 4 followers View post →
Xenon
@CO2caine · X

RT @JornTrommelen: Carbohydrates are the main fuel source during high exercise intensities. Full breakdown: https://t.co/lGm6WgQyRO Study…

Apr 5, 2021 · 8 shares · 553 followers View post →
Madhan Ramanathan
@sportsphysiouk · X

RT @JornTrommelen: Carbohydrates are the main fuel source during high exercise intensities. Full breakdown: https://t.co/lGm6WgQyRO Study…

Apr 3, 2021 · 8 shares · 1,145 followers View post →
Claudio Chinaglia
@claudiochinagli · X

RT @JornTrommelen: Carbohydrates are the main fuel source during high exercise intensities. Full breakdown: https://t.co/lGm6WgQyRO Study…

Apr 3, 2021 · 8 shares · 119 followers View post →
Shannon Fizer, M.Sc.
@shannon_fizer · X

RT @JornTrommelen: Carbohydrates are the main fuel source during high exercise intensities. Full breakdown: https://t.co/lGm6WgQyRO Study…

Apr 3, 2021 · 8 shares · 152 followers View post →
dmcabler
@dmcabler · X

RT @JornTrommelen: Carbohydrates are the main fuel source during high exercise intensities. Full breakdown: https://t.co/lGm6WgQyRO Study…

Apr 3, 2021 · 8 shares · 251 followers View post →
Liz Monserrath Ortiz
@LizMonserrath · X

RT @JornTrommelen: Carbohydrates are the main fuel source during high exercise intensities. Full breakdown: https://t.co/lGm6WgQyRO Study…

Apr 2, 2021 · 8 shares · 34 followers View post →
fenuso
@fenuso1 · X

RT @JornTrommelen: Carbohydrates are the main fuel source during high exercise intensities. Full breakdown: https://t.co/lGm6WgQyRO Study…

Apr 2, 2021 · 8 shares · 124 followers View post →
Daniel Brockmann Ernährungs Coaching
@DanielsFuNcoach · X

RT @JornTrommelen: Carbohydrates are the main fuel source during high exercise intensities. Full breakdown: https://t.co/lGm6WgQyRO Study…

Apr 2, 2021 · 8 shares · 191 followers View post →
Jorn Trommelen, PhD
@JornTrommelen · X

Carbohydrates are the main fuel source during high exercise intensities. Full breakdown: https://t.co/lGm6WgQyRO Study: https://t.co/IFSDsfYXBr #carbs #fats #exercise https://t.co/VcQ5YA69Ij

Apr 2, 2021 · 39 likes · 8 shares · 7,619 followers View post →
nick owen
@nickowen5 · X

RT @Gonzalez_JT: Maybe its just me! But I find it surprising in light of data like this where glycogen is still a major contributor at low…

Dec 14, 2019 · 3 shares · 602 followers View post →
Nusrat Kausar
@NusratkRD · X

RT @Gonzalez_JT: Maybe its just me! But I find it surprising in light of data like this where glycogen is still a major contributor at low…

Dec 14, 2019 · 3 shares · 3,237 followers View post →
Shaun Scott
@upyrbike · X

RT @Gonzalez_JT: Maybe its just me! But I find it surprising in light of data like this where glycogen is still a major contributor at low…

Dec 14, 2019 · 3 shares · 1,436 followers View post →
Sandro F. da Silva
@sandrofersilva · X

RT @BSinger10: The effects of increasing exercise intensity on muscle fuel utilisation in humans from Luc van Loon #AMSSM19 https://t.co/…

Apr 15, 2019 · 2 shares · 552 followers View post →
Łukasz Czerw
@UCzerw · X

RT @BSinger10: The effects of increasing exercise intensity on muscle fuel utilisation in humans from Luc van Loon #AMSSM19 https://t.co/…

Apr 15, 2019 · 2 shares · 67 followers View post →
Brett Singer MS,RD,CSSD
@BSinger10 · X

The effects of increasing exercise intensity on muscle fuel utilisation in humans from Luc van Loon #AMSSM19 https://t.co/H9AN8jwIbR

Apr 15, 2019 · 2 likes · 2 shares · 2,820 followers View post →