Bret Contreras, PhD @bretcontreras
PhD, CSCS,*D, lifter, personal trainer, researcher, speaker, blogger, author, inventor, gym owner (Glute Lab), lover of all things S&C BretContreras.Com San Diego, CA Joined November 2009-
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First study comparing hip thrust and squat on gluteus hypertrophy and strength gains. Hip thrust and back squat training elicit similar gluteus muscle hypertrophy and transfer similarly to the deadlift. @DanielPlotkin_ @DrMikeRoberts @bretcontreras biorxiv.org/content/10.110…
Important data by @DanielPlotkin_ and our Auburn team and fantastic collab with @bretcontreras and @MennoHenselmans. Similar glute hypertrophy with hip thrust vs back squats and cool strength data to boot. #truth!!! biorxiv.org/content/10.110…
Regional regulation of focal adhesion kinase after concentric and eccentric loading is related to remodelling of human skeletal muscle. @MVFranchi pubmed.ncbi.nlm.nih.gov/29438584/
LMFAO! So true
Sprint acceleration⚡️🏃♂️& Ground Reaction Force Yes the vertical component magnitude is higher, but is it the most important to generate forward ⏩motion? Force plates numbers & explanations in this 🎥 experiment👇 Magnitude vs Importance⚠️ youtu.be/35sy9SPjbiU via @YouTube
Interesting new sprint and/or hammy studies this week: 1. pubmed.ncbi.nlm.nih.gov/36650696/ @ShayneMarcVial @TonyBlazevich et al 2. pubmed.ncbi.nlm.nih.gov/36651683/ Sancase @AnneDelextrat et al. 3. pubmed.ncbi.nlm.nih.gov/36651719/ Behan @davidopar @ryan_timmins @RodWhiteley et al.
Divergent remodeling of the skeletal muscle metabolome over 24 h between young, healthy men and older, metabolically compromised men sciencedirect.com/science/articl…
New meta shows no interference for hypertrophy at whole muscle level from concurrent training. However, HIIT impaired hypertrophy at the fiber level (both type 1&2) but continuous steady-state did not. Majority of studies were in untrained individuals journals.lww.com/nsca-jscr/Abst…
I've done a lot of podcasts over the years; this is one of my favorites 💪
I've done a lot of podcasts over the years; this is one of my favorites 💪
Gene testing for muscle growth? Myostatin gene (negative regulatory of muscle growth): "convincingly demonstrates an association between the studied polymorphism (MSTN rs1805086 - R minor) and strength phenotype of athletes" pubmed.ncbi.nlm.nih.gov/36360291/
This review investigates the benefits of exercise on tissue regeneration in diverse organs, mainly focusing on musculoskeletal system, cardiovascular system, and nervous system, while discussing the underlying molecular mechanisms and emerging therapeutic exercise mimetics.
I'm often asked who to trust for fitness info. This image provides a blueprint for determining whether someone's legit. 💪🏽
Contrary to popular opinion, this review showed that bilateral strength training transferred better to sprinting performance than unilateral training. link.springer.com/article/10.100…
So proud to finally have my honours work fully published in @MSSEonline ! 📌 ECC hip training ⬆️ BFlh fascicle length, eccentric strength, BFlh & SM volume 📌 ISO hip training ⬆️ isometric strength, ST volume, but not BFlh fascicle length pubmed.ncbi.nlm.nih.gov/35941515/
Understanding the female athlete: molecular mechanisms underpinning menstrual phase differences in exercise metabolism. link.springer.com/article/10.100…
@AJPCellPhys, ‘PCM1 labelling reveals myonuclear and nuclear dynamics in skeletal muscle across species’ @dan_owie @CEStewartPhD @CoiraultC @AbigailMackey1 & JC Jarvis @LJMUSportSci @UFPostdocs @ISMCopenhagen @researchmyology journals.physiology.org/doi/abs/10.115…
📢🧑🔬🔬💪We really put our blood, sweat, and tears into this one. #myotwitter. #Titin force in muscle cells alters lattice order, thick and thin filament protein formation | Proceedings of the National Academy of Sciences pnas.org/doi/10.1073/pn…
🚨Broke another World Record! 🚀 Highest Seated Jump! 🙏🏽🇲🇾❤️
Are high rep resistance training protocols superior to increase muscle capillarization? A thread 🧵👇 #capillarization #highrep #resistancetraining
New Preprint Skeletal muscle DNA methylation and mRNA responses to a bout of higher versus lower load resistance exercise in previously trained men From @CaseySexton1 @godwinjs71 @ShelbyOsburn8 @ZiegenfussTim @DrAdamPSharples @DrMikeRoberts doi.org/10.1101/2022.1…
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The Sp⚽️rts Physi.. @AdamMeakins
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23K Followers 194 Following PhD, CSCS-D | Professor @UAM_Madrid | CEO @MyJumpLab | Performance consultant of pro athletes 💪🏻🔬📱 📥 [email protected]
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957 Followers 478 Following Adjunct Associate Professor at Federation University Australia, strength and conditioning and sport science
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Matt Bourne @MBourne5
4K Followers 630 Following Associate Professor, Exercise Science @griffith_uniFirst study comparing hip thrust and squat on gluteus hypertrophy and strength gains. Hip thrust and back squat training elicit similar gluteus muscle hypertrophy and transfer similarly to the deadlift. @DanielPlotkin_ @DrMikeRoberts @bretcontreras biorxiv.org/content/10.110…
Important data by @DanielPlotkin_ and our Auburn team and fantastic collab with @bretcontreras and @MennoHenselmans. Similar glute hypertrophy with hip thrust vs back squats and cool strength data to boot. #truth!!! biorxiv.org/content/10.110…
More fun today. Tested unilateral hip thrust jumps and did a LV profile to see where power peaks. Seems to be ~65% of max (did not include system weight). This would make it a quite strength dominant peak power exercise?:)
Minimizing Spine Motion during the Dead Lift - an n=1 tiny and janky experiment. I used xsens motion sensors on L1 and S1 to calculate lumbar spine kinematics. I then did two types of a deadlifts: 1. A "fluid deadlift" where I let my spine bend naturally...1/x
@bretcontreras @MBourne5 @LauraDiamond05 @EvyMeinders @bas_goncalves @ActivateGlutes @Griffith_Uni @MenziesHealth I agree, the explanation isn't obvious. The muscle force pattern is relatively flat, so not suprising that peak could jump from max flexion to max extension. My guess is that it results due to change in hip moment with additional weight
@bretcontreras @MBourne5 @LauraDiamond05 @EvyMeinders @bas_goncalves @ActivateGlutes @Griffith_Uni @MenziesHealth Thanks Bret! Appreciate the kind words and great questions
@bretcontreras @MBourne5 @LauraDiamond05 @EvyMeinders @bas_goncalves @ActivateGlutes @Griffith_Uni @MenziesHealth Using single-leg variation, I think most participants struggled to hyperextend. Especially when loaded. Whereas RDL & squat I cued them to 'stand tall' between reps which perhaps resulted in some hyperextension.
@bretcontreras @MBourne5 @LauraDiamond05 @EvyMeinders @bas_goncalves @ActivateGlutes @Griffith_Uni @MenziesHealth But as you highlight, 'generic' parameter choices can have a big impact on outputs. To account for this, we actually personalised MTU properties to each indiviudal using a model calibration to better reflect the measured joint moments & muscle activations
@bretcontreras @MBourne5 @LauraDiamond05 @EvyMeinders @bas_goncalves @ActivateGlutes @Griffith_Uni @MenziesHealth Good observation. It was Lai et al 2017 who made these modifications to tendon slack lengths:link.springer.com/article/10.100…. From what I understand, they sought to reduce the passive forces at deep flexion, by reducing fibre lengths, and as a result increased tendon slack length
This is why I’m on Twitter: interesting and cordial discussion amongst experts 👇
@TylerCollings3 @MBourne5 @LauraDiamond05 @EvyMeinders @bas_goncalves @ActivateGlutes @Griffith_Uni @MenziesHealth Again, amazing paper. One of the best done on the glute max I've ever seen. Thank you mucho and looking forward to your feedback.
@bretcontreras @GregLehman Thanks for chiming in. Interesting. Maybe confirmation bias here but thats why it's both/and to me. We get value in what Greg said but also in EMG studies.
@TylerCollings3 See, that's my view. It's not perfect but it's largely all we got. What's the alternative? Work within the known limitations. Thanks for the share and thoughts.
Regional regulation of focal adhesion kinase after concentric and eccentric loading is related to remodelling of human skeletal muscle. @MVFranchi pubmed.ncbi.nlm.nih.gov/29438584/
Sprint acceleration⚡️🏃♂️& Ground Reaction Force Yes the vertical component magnitude is higher, but is it the most important to generate forward ⏩motion? Force plates numbers & explanations in this 🎥 experiment👇 Magnitude vs Importance⚠️ youtu.be/35sy9SPjbiU via @YouTube
@SanDiegoJoey @DrAndyGalpin @PeterAttiaMD Andy and I have collaborated on research. Much respect for him and his work
@BradSchoenfeld @SanDiegoJoey @PeterAttiaMD What he said! Brad is one of the most prolific and influential exercise scientists we've ever seen. STUD!
Interesting new sprint and/or hammy studies this week: 1. pubmed.ncbi.nlm.nih.gov/36650696/ @ShayneMarcVial @TonyBlazevich et al 2. pubmed.ncbi.nlm.nih.gov/36651683/ Sancase @AnneDelextrat et al. 3. pubmed.ncbi.nlm.nih.gov/36651719/ Behan @davidopar @ryan_timmins @RodWhiteley et al.
@PJBPerfTng This is a good read by late Mel Siff
Divergent remodeling of the skeletal muscle metabolome over 24 h between young, healthy men and older, metabolically compromised men sciencedirect.com/science/articl…
Trends for United States
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