The overall digital discussions demonstrate strong consensus supporting the idea that reaching fatigue activates muscle fibers independently of load, with posters highlighting practical applications and scientific debates. The tone is analytical and motivational, using technical examples like electromyography and glycogen markers to emphasize the research's importance and potential to change exercise strategies.
AgreementStrong agreement
Most discussions reinforce the study's findings, emphasizing that muscle fiber activation remains consistent regardless of load, indicating strong agreement.
InterestHigh interest
Posters are highly engaged, discussing practical implications, methods, and challenging long-standing beliefs, showing strong interest.
EngagementHigh engagement
Posts reference specific mechanisms like glycogen depletion, electromyography, and muscle recruitment, reflecting deep engagement with the research.
ImpactHigh impact
The conversations suggest significant implications for training practices and fitness science, indicating high perceived impact.
Abstract in brief
The study finds that muscle fibre activation during resistance exercise performed to failure is similar regardless of load (heavy or light) and repetition duration, indicating both loads activate type II muscle fibres effectively.
Surface electromyography (EMG) measures do not directly correlate with muscle fibre glycogen depletion or anabolic signaling during exercise, suggesting EMG may not fully reflect muscle activation or growth processes.
Engaging in resistance exercise to task failure consistently activates type II fibres, challenging the idea that heavier loads are necessary for hypertrophy and highlighting the importance of reaching fatigue to fully recruit muscle fibers.]
@StrengthDebates Research generally doesn't support that hypothesis. If there is a preferential influence of load on fiber type, which remains equivocal, the magnitude of effect likely would be small.
https://t.co/aYGUzDUWyK
https://t.co/e17WEVyljs
Jan 20, 2025 · 127 likes · 5 shares · 95,810 followersView post →
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YLMSportScience
@YLMSportScience · X
#New
Aug 29, 2019 · 117 likes · 47 shares · 81,607 followersView post →
Oct 18, 2020 · 114 likes · 25 shares · 27,582 followersView post →
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Stuart Phillips (he/him)
@mackinprof · X
So, this figure is w...wr...wro...wrong! The 'sweet spot for hypertrophy is across the whole repetition continuum and strength at lower loads is largely due to practice! All fibres active when fatigue is achieved, see https://t.co/87JgqCM6FW https://t.co/Ft3XHfF6f0
Feb 23, 2022 · 76 likes · 10 shares · 56,060 followersView post →
JL
Jeremy Loenneke
@jploenneke · X
Using changes in glycogen as a marker of activation..work suggests that low loads can in fact result in the activation of Type II fibers if taken to failure..this corroborates previous chronic data from their lab and others @RobMorton23 @mackinprof
Link: https://t.co/YmrU93I780 https://t.co/hQz1CUnMyP
筋肥大には高重量か低重量か?
【答え】
高重量・低重量に関わらず、限界まで行うこと。
Muscle fibre activation is unaffected by load and repetition duration when resistance exercise is performed to task failure https://t.co/OG6FsYt5cD
Muscle fibre activation during resistance exercise performed to failure is consistent across different loads and repetition durations, emphasizing the importance of reaching fatigue to fully activate muscle fibers…
Learn the secrets of reps and weights to boost your fitness results. Muscle fiber activation during resistance exercise to failure is similar regardless of load, emphasizing the importance of reaching fatigue for…
@Gh_q02 تمرين مثل kickbacks ممكن يعطيك EMG عالي بسبب وضعية الحركة والانقباض الاخير، لكن skull crushers بالدامبل او بار راح يكون افضل للتراي لأنه يحطها تحت توتر ميكانيكي أعلى مع مقاومة حقيقية على مدى الحركة الكامل
وهذي دراسة ضد ال EMG
https://t.co/BPbd2QTJXx.
RT @BradSchoenfeld: @StrengthDebates Research generally doesn't support that hypothesis. If there is a preferential influence of load on fi…
Jan 20, 2025 · 5 shares · 1,004 followersView post →
HW
Hsieh-Hsing Wu
@TaiwanOzPhysio · X
RT @BradSchoenfeld: @StrengthDebates Research generally doesn't support that hypothesis. If there is a preferential influence of load on fi…
Jan 20, 2025 · 5 shares · 995 followersView post →
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William Amaral
@_sempreguica · X
RT @BradSchoenfeld: @StrengthDebates Research generally doesn't support that hypothesis. If there is a preferential influence of load on fi…
Jan 20, 2025 · 5 shares · 120 followersView post →
BP
Brad Schoenfeld, PhD
@BradSchoenfeld · X
@StrengthDebates Research generally doesn't support that hypothesis. If there is a preferential influence of load on fiber type, which remains equivocal, the magnitude of effect likely would be small.
https://t.co/aYGUzDUWyK
https://t.co/e17WEVyljs
Jan 20, 2025 · 127 likes · 5 shares · 95,810 followersView post →
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OJSN
@iamojsn · X
https://t.co/4qfPkJn5gR
https://t.co/7rZ4QMOu1V
Jan 19, 2025 · 3 likes · 15,009 followersView post →
@Alan_Couzens @Fit_For_Golf @BradSchoenfeld When you allow people to work to fatigue, the fibre recruitment is the same regardless of load:
https://t.co/t9asyxzjxR
We've shown that TUT and volume modulate this response, but it's not a load-dependent outcome:
https://t.co/v5sUoS1m0U
https://t.co/67MgRBkv7s
@CaloriesProper Bill, I came across this a few days ago. Seems to me that if the results can be duplicated it would make training a whole lot easier for people to understand.
I'm interested in your thoughts.
https://t.co/a6NlGJgtdg
@Fit_For_Golf @Tom_Babington1 @JR_Potvin @SandCResearch the great 'equalizer'? https://t.co/87JgqCuvhm
Like I said, when we got into this we didn't want to do anything except disrupt the incorrect notion that there was some 'sweet spot' for hypertrophy per the usual strength-endurance continuum.
Feb 25, 2022 · 1 like · 56,060 followersView post →
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Emmanuel Novas
@novasman100 · X
RT @mackinprof: So, this figure is w...wr...wro...wrong! The 'sweet spot for hypertrophy is across the whole repetition continuum and stren…
Feb 24, 2022 · 10 shares · 61 followersView post →
CE
Chrisk_ep
@CK_ExPhys · X
RT @mackinprof: So, this figure is w...wr...wro...wrong! The 'sweet spot for hypertrophy is across the whole repetition continuum and stren…
Feb 24, 2022 · 10 shares · 72 followersView post →
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Darcy
@AirBison · X
RT @mackinprof: So, this figure is w...wr...wro...wrong! The 'sweet spot for hypertrophy is across the whole repetition continuum and stren…
Feb 23, 2022 · 10 shares · 551 followersView post →
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Karageorgos
@Karageorgos15 · X
RT @mackinprof: So, this figure is w...wr...wro...wrong! The 'sweet spot for hypertrophy is across the whole repetition continuum and stren…
Feb 23, 2022 · 10 shares · 610 followersView post →
CT
Craig TX
@AntiAgingN · X
RT @mackinprof: So, this figure is w...wr...wro...wrong! The 'sweet spot for hypertrophy is across the whole repetition continuum and stren…
Feb 23, 2022 · 10 shares · 863 followersView post →
MA
mar alvarez
@mar_rugby_rugby · X
RT @mackinprof: So, this figure is w...wr...wro...wrong! The 'sweet spot for hypertrophy is across the whole repetition continuum and stren…
Feb 23, 2022 · 10 shares · 2,684 followersView post →
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Matthew Stratton PhD
@MTSstrength89 · X
RT @mackinprof: So, this figure is w...wr...wro...wrong! The 'sweet spot for hypertrophy is across the whole repetition continuum and stren…
Feb 23, 2022 · 10 shares · 165 followersView post →
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Stuart Phillips (he/him)
@mackinprof · X
So, this figure is w...wr...wro...wrong! The 'sweet spot for hypertrophy is across the whole repetition continuum and strength at lower loads is largely due to practice! All fibres active when fatigue is achieved, see https://t.co/87JgqCM6FW https://t.co/Ft3XHfF6f0
Feb 23, 2022 · 76 likes · 10 shares · 56,060 followersView post →
SH
Stuart Phillips (he/him)
@mackinprof · X
@BradSchoenfeld @NachikethShetty Try lifting a lighter load with more reps - it's just as 'intense' when you get close to fatigue. Plus, MU recruitment the same https://t.co/87JgqCM6FW so all muscle fibres active - entirely consistent with the size principle; see:
https://t.co/JqR04nmIxt via @JR_Potvin
Jan 14, 2022 · 7 likes · 56,060 followersView post →
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Rosalie Brown
@rosaliebrownfit · X
RT @AnastasiosMakr4: @MalteTherkildse Yes you can:
https://t.co/Q5MR9y6SLV
Jan 1, 2022 · 2 shares · 1,930 followersView post →
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ivan navarro martin
@ivannavarromart · X
RT @AnastasiosMakr4: @MalteTherkildse Yes you can:
https://t.co/Q5MR9y6SLV
@MalteTherkildse Yes you can:
https://t.co/Q5MR9y6SLV
Jan 1, 2022 · 6 likes · 2 shares · 423 followersView post →
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OJSN
@iamojsn · X
Muscle fibre activation is unaffected by load and repetition duration when resistance exercise is performed to task failure - PubMed - https://t.co/FOYzS2a81N
Dec 16, 2020 · 19 likes · 1 share · 22,562 followersView post →
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Stuart Phillips (he/him)
@mackinprof · X
@TonyBoutagy Hi Tony, yes that diagram would be inconsistent with - assuming high RPE in each condition - MU recruitment. Actual data showing the diagram is wrong: https://t.co/6ID7s3wsD6 stay tuned as @avigotsky @JR_Potvin and myself are looking to rectify people's understanding here.
Nov 26, 2020 · 5 likes · 56,060 followersView post →
@AbigailMackey1 Thanks, Abigail. Yes, indeed. We haven't yet looked at markers of adaptions. But the idea is supported by a study by Morton et al. @RobMorton23 , who showed a correlation between glycogen depletion and anabolic signalling. https://t.co/JX1Q9ckT3n
Performing resistance training exercises to failure, regardless of load lifted or repetition duration, necessitates the activation of type II muscle fibres https://t.co/da8Nw382Fq
May 8, 2020 · 4 likes · 3 shares · 1,999 followersView post →
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Robert W. Morton (Rob)
@RobMorton23 · X
RT @JPhysiol: 'Muscle fibre activation is unaffected by load and repetition duration when resistance exercise is performed to task failure'…
'Muscle fibre activation is unaffected by load and repetition duration when resistance exercise is performed to task failure' from @McMasterU #fatigue #musclefibre #exercise https://t.co/ZNyXKqJbah https://t.co/B4xjjzmoG9
筋肥大には高重量か低重量か?
【答え】
高重量・低重量に関わらず、限界まで行うこと。
Muscle fibre activation is unaffected by load and repetition duration when resistance exercise is performed to task failure https://t.co/OG6FsYt5cD
Aug 31, 2019 · 47 shares · 438 followersView post →
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Bryce Lee
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RT @RobMorton23: Published online! Muscle fibre activation is unaffected by load when resistance exercise is performed to task failure. A b…
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Fitness Alberta
@FitnessAlberta · X
RT @RobMorton23: Published online! Muscle fibre activation is unaffected by load when resistance exercise is performed to task failure. A b…
Aug 22, 2019 · 19 shares · 1,065 followersView post →
ML
3MAP Lab
@3maplab · X
Rob Morton tweeted: Published online! Muscle fibre activation is unaffected by load when resistance exercise is performed to task failure. A big physiology/biomechanics collaboration with @mackinprof @JR_Potvin @KeirPeter @AmandaFariasZu and @DrMikeSonne! https://t.co/hZ0M5DEp4p
Using changes in glycogen as a marker of activation..work suggests that low loads can in fact result in the activation of Type II fibers if taken to failure..this corroborates previous chronic data from their lab and others @RobMorton23 @mackinprof
Link: https://t.co/YmrU93I780 https://t.co/hQz1CUnMyP
Muscle fibre activation is unaffected by load and repetition duration when resistance exercise is performed to task failure - Morton - - The Journal of Physiology - Wiley Online Library https://t.co/BBMR3PeoS3 Muskelversagen bringt Muskelwachstum, unabhängig vom Gewicht.
Muscle fibre activation is unaffected by load and repetition duration when resistance exercise is performed to task failure - Morton - - The Journal of Physiology - Wiley Online Library https://t.co/fOPIX4lbr5
Jul 15, 2019 · 1 like · 1 share · 867 followersView post →
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Alexander Quinones Sánchez
@alexquisan · X
RT @mackinprof: Muscle fibre activation is unaffected by load and repetition duration when resistance exercise is
performed to task failure…
Muscle fibre activation is unaffected by load and repetition duration when resistance exercise is performed to task failure - Morton - - The Journal of Physiology - Wiley Online Library https://t.co/PWmXUG7f7k
Muscle fibre activation is unaffected by load and repetition duration when resistance exercise is performed to task failure @JPhysiol https://t.co/qzL8ktquLR
More compelling evidence from @mackinprof suggesting the driver of muscle hypertrophy is effort, not load. Simple application for older adults, especially untrained, just grab a Borg scale and aim for high effort with light or heavy! https://t.co/KbWuWCCIqL
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