Consultant Perf Scientist/ S&C. PhD Neuro-Muscle-Tendon Adaptations to Resistance Training πββοΈ musclemechanicslab.com
N. Ireland
Based in United Kingdom
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Mechanical overload alters gene expression in a distinct population of myonuclei near muscle fibre ends, suggesting specialised roles in adaptation.
doi.org/10.1186/s13395-026-0β¦
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Sincerest condolences to the friends & family of @ciaramageean . Had the pleasure of meeting Ciara several times. Grit personified. Great person, incredible athlete & proud Down Camog. RIP Ciara π βοΈ π΄β«οΈ
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Is Ca2+ ion fatigue a well established phenomenon that we can tailor our training around? Well, not really... but that doesnt stop the social media gurus π
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Proud to be invited to the legendary Narodne Sportove Centrum in Bratislava next month to talk about muscle activation and its role in training, performance & adaptation. Hope to see some of you there πͺβ‘οΈπ§
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@JeffNippard tries a 30-day hypertrophy program training arms every day πͺ
Will this contribute to the science .... or is it social media entertainment? π
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π₯π₯Chest Hypertrophy Tip π₯π₯
Load up heavy in the mid-range. Huge torque profile due to length-tension r'ship and mechanical advantage overlap (and bit of passive tension in there also).
#hypertrophy
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A lot to get through in part 3 β apologies itβs a long one!
Stiffness & RFD, research limitations, representative 'sprinters' in research?.. and where does the increase in stiffness come from?
πββοΈβοΈπͺ
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You are still trying to coerce me into giving you a government ID document. I have 2 step verification on and want to use it for account security purposes, so this is not 'crucial'. Are you telling me you're permanently suspending me unless I provide you with a government ID?
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Hey @LinkedIn
Why are you trying to coerce me to provide you with a government ID and facial picture to access my account? Ive 2 factor authentication in place yet you've frozen me out and forcing me to comply to access my account. Unfreeze this immediately please
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Does a compliant tendon store β¬οΈ energy than a stiffer one? Apparently the S&C profession are getting it wrong by β¬οΈ tendon stiffness. Also, apparently compliance leads to quasi-iso contractions
So who actually knows about how tendons store energy & how the MTC functions in πββοΈ?
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"Sprinters have the same tendon stiffness or are more compliant than untrained controls?"
Sure - if you cherry-pick weak data and misunderstand tendon biomechanics
The usual awful stuff from Chris Beardsley here.
So this is Part 1 of a 3-part video @lahti_johan @GregLehman
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Whats the influence of contraction mode (con v ecc) or muscle length (shorter v longer) on neuromechanical /architectural behaviour of BfLh?
Data phase in our acute study looking at 4 SLDL variations using EMG, Vicon & ultrasound @Rodn3yK3nn3dy @BasVanHooren @TonyBlazevich
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Single-site muscle thickness substantially underestimated MRI-derived hypertrophy and showed no meaningful relationship with MRI changes following 15 weeks of resistance training. See summary in image below
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π₯π₯ Important New study on Hypertrophy Measurements πββοΈπͺπ
What did it look at?
See below π
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Ive seen many people suggest what England could do to mitigate the effects of acute altitude physiologically during the game. The one I haven't seen anyone suggest yet, which is within the rules & would provide the largest benefit is HYPEROXIA (supplemental O2) @BBCSport
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There was an inverse relationship between absolute & normalised baseline fascicle length & the pre-post change in fascicle length, suggesting the longer your pre-training fascicles are, the smaller the magnitude of change we can expect with a block of πββοΈ
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Muscle thickness increased similarly between lengthened partial & full ROM across all muscle sites
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Interesting new study on BFR vs High intensity πββοΈ on muscle-tendon complex adaptations in π΄
High intensity πββοΈ led to sig β¬οΈ tendon stiffness and strength than BFR, with similar tendon CSA increases in both conditions.
#tendon #strength #adaptation
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This pre-print of a paper caused quite a stir recently on social media. The authors suggest that 9 vs 36 fractional sets of πββοΈ produce equivalent hypertrophy πͺ
However... how confident are we of these findings, particularly in relation to measures?... 1/
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This is how our πͺ work in REAL LIFE
Check out the architecture of the quadriceps during their primary function- knee extension. Imaging internal structures in real time help our biomechanical models & help us develop the best πββοΈ for muscle size, strength & rehab
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Live demo of how EMG amplitudes & firing rates and how common 'activation' exercises have underwhelming consequences for muscle activity and overall preparation especially compared to more gross mechanical activities. Let's just say the crowd were convinced!
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How MUR and mean firing rates affect the nature of muscle contractions in strength & Power development π
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What a weekend of learning and sharing at the @SportsmithHQ Strength & Power conference. Too much to get thru but briefly in my session we looked at
- role of and methods to β¬οΈ Motor Unit Recruitment
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Another one of these silly posts giving ppl a completely distorted view of reality & how quickly u can accrue muscle mass
40lbs in 7wks is over 2kg of muscle per wk, 18kg in total! Absolutely physiologically impossible π
Holy muscle protein synthesis rate batman
@mackinprof
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Finally after about my 10th visit to πΊπΈ ive managed to get some β³οΈπββοΈ in.
Great courses here in Orlando, swininging down the 14th here at ChampionsGate. But man is it warm π₯΅π
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Interesting findings from this SRMA: Isos appear β¬οΈ than dynamic for iso strength, but βοΈ btwn iso & dynamic for dynamic performance!
We've just mentioned something similar in our latest paper- that u can 'engineer' similar changes in dyn perf with multi-angle isos.
Effects of isometric vs. dynamic resistance training on isometric and isokinetic muscular strength: A systematic review with meta-analysis
jsams.org/article/S1440-2440β¦
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Case & point. Ive seen this post 1000x. There's enough ppl out there think this is a genuine 'transformation' from endurance to 'strength' athlete & is down to training. It's not, it never has and never will.
The amount of anabolic steroids used these days is π€―π
U see it in ur gym & so-called SM 'influencers' obviously on them (bt nvr admit it)..& now we start 2 see the ever β¬οΈ influencer deaths associated with them
And yet some ppl look at that needle and still say yes please π«€
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was watching slo mo of schefflers swing. Is that man an owl? Incredible thoracic, lumbar and shoulder mobility π¦β³οΈπββοΈ
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π¨π΄ Liverpool hopeful to complete hijack for 17 year old striker Will Wright after Arsenal verbally agreed deal two weeks ago.
Salford City accepted #LFC bid as well as @daveockop reported, Liverpool now proceeding with formal steps on player side to get it signed asap.
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Quick trip down to Dublin yday βοΈ
Fillet steak @MarcoPierreWht steakhouse with some π·
Then to rock out to the mighty @Weezer at Trinity College π€
That was their best playlist in 20yrs I've been seeing them πΈ
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because mechanical tension doesn't increase at all. In fatigue the F-V curve shifts directly down. β¬οΈ the fatigue β¬οΈ the shift. It's impossible for your last reps to produce β¬οΈ force than initial reps unless u were πββοΈ too fast at start...& you'd still need 2 go max iso!!
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π¨New study on Hamstrings Volume & Architecture β‘οΈ 9wks Nordics π¨
Findings π§
- muscle volume β¬οΈ in all muscles but most in ST (26%) & BfSh (22%)
- Fibre tract length β¬οΈ in all bt mostly ST (18%).
- Fibre tract lengths all returned to BL β‘οΈ 3wks detraining.
key figure below π
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Thanks @NorthernIreland men's β½οΈ science & medicine team for having me today. Talking thru enhancing exercise prescription of the neuro-muscle-tendon systems for β½οΈ training, performance & recovery
Thanks for π 4 the collection π
@UlsterSchSport
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Still time to register for this cracking @delsysinc webinar on EMG in applied sport. Monday 9th June at 6.30pm GMT.
>500 attendees booked on already π€―
register here: bit.ly/433wjDE π
My talk is up first π
#EMG #Muscle #sportsapplications
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Sad to hear Voletta Wallace passed away in February. Never got a chance to see justice served for her sons murder. Maybe would've got a lot closer had the LAPD not sidelined @GregKading from the case
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Really enjoying using the @delsysinc Galileo sensors with NeuroMap software to decompose motor units. Here are 36 beautiful MUs from the vastus lateralis along with MUFRs for 3secs on 3secs off isos to failure. π€©π€ #motorunitrecruitment #EMG #Muscle @amy_robinson2
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π― knee extended and in dorsiflexion..Forces ~ x4 in GM and x2.5 in GL vs plantarflexion
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Delighted to take part in the @niscifest today with my 'Muscles Alive' talk on muscles in sport, health & disease. Then we had some fun will real-time imaging of muscles (ultrasound) and neuromuscular input (emg). Great audiences thanks for all your questions @UlsterSchSport
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this is why 'lengthened' partials are best for hypertrophy at most dorsiflexed position. But the muscle isn't at long lengths here. it's working at the top of ascending limb/ early plateau of L-T relationship. I was recommending this nearly 15yrs ago!
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Here is an example. The gastrocnemius medial head gets its β¬οΈ activation at moderate plantar flexion. Just look at the difference btwn the fascicle force at that joint angle/ fascicle length vs peak fsscicle force. 235% lower at max activation!
Highest *muscle* forces often don't occur at the same joint angle as peak muscle activation of a given task. This is very different to where peak torque occurs also as that's merely the interaction btwn muscle force & moment arm length. For hypertrophy- force is king π€΄πΎ
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If you've electricity at the minute in NI count yourself lucky #StormEowyn
If anyone wants some firewood you're more than welcome to come & claim it at my house as long as you're willing to cut it from all my fallen trees π³ πͺ
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here is an intermediary filament that has a lattice that spans the z disc & M line which would transmit force longitudinally & in parallel simultaneously in adult skeletal muscle
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This paper actually shows 2.6 and 2.4Mm at full ext & I've seen other that puts them slightly β¬οΈ at 2.8 & 2.6 for long/short head. Either way they aren't lengthened! I also measured FL with shoulder abducted behind (not pubbed). Not lengthened
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implications for resistance training prescription and for resistance training session design πͺ
Also many thanks to the wizard Rui Wu part of collaboration with UCD on HD-EMG
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V proud of PhD student Amy Neeson presenting our study on rest interval duration on neuromuscular function at #BBEP. Reps & muscle fibre conduction velocity @ 80%MVC r β¬οΈ using 2min vs 5min rest btwn sets. But torque is β¬οΈ acutely after πββοΈ following 5min rest. Important
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Amazing start to #BBEP conference @physoc with @SPMagnuss talking about muscle-tendon adaptation after achilles tendon rupture followed by @JSkarabot on motoneuron inhibtion & impaired function in diff knee conditions πͺ What a morning session
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Personally I don't find this paper & figure very helpful or gives me any new information. I considered writing something like this a few yrs ago but soon realised - when you really look at literature a generalisation of these recovery timelines is impossible because the ...
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Wow - fantastic paper here showing sarcomeregenesis of the BFlh following training - combined with previous work suggests fascicles stretch in early adap then eventually add sarcomeres to likely reestablish the sarco length-tension r'ship πͺπ sciencedirect.com/science/arβ¦
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Why I β€οΈ my aga after having it off during the summer. Extra rump steak cooked medium rare yesterday. Reheat in the aga as if it was fresh off the pan tonight and it remains medium rare. ππ€
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π image frm PhD proposal in 2009 where we suggested isolate the effects of stretch and also diff mechanics for hypertrophy etc. Presented data at confs 2010-12 with 1st 2 papers pubbed in 2013/14. Nobody had ever done this before partials wer previously done at shortened lengths
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And that's a wrap on Amy's first PhD study looking at rest interval duration and motor unit performance & behaviour π¬
Absolute pleasure working with our HD-EMG legends Rui & Jeremy π
The first of hopefully many successful collaborations @UlsterSchSport @UCD_ElecEng
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Great 1st day of testing for Amy's PhD looking at effects of rest interval length on motor unit behaviour using HD-EMG. πͺβ‘οΈπ Delighted to welcome the brilliant Rui, Jeremy & Caoimhe frm @UCD_ElecEng up to @UlsterSchSport for the collaboration π
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muscle activity πͺ β‘οΈ was β¬οΈ in sets 2, 3 & 4 in 2min vs 5min and also pre-post MVIC muscle activity was also β¬οΈ in 2 vs 5min
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β¬οΈ peak torque after set 2 during exercise & larger β¬οΈ peak torque pre-post exercise in 2min vs 5min rest
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Another productive week of testing @SportIreCampus on our study looking at effects of super spikes on sprinting perf & biomechanics πββ‘οΈπβ‘οΈ @carragher_paul
Thanks @JOSullivan__ @Rodn3yK3nn3dy & @roones77 & @sportireland for the continued funding support
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Celebratory pint of milk for winning the primary 4 sprint today π
πββοΈ
Really surprised she won - we forgot to activate her glutes before the race π€£π€£π
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Excited that our paper had been accepted in @SportsMedicineJ a 5-year collaboration with the brilliant @ProfJillCook. Lots of twists and turns but we got there eventually π
We look at the differences in male and female tendons at what it may (or may not) mean for tendon health
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possibly not. this study onlinelibrary.wiley.com/doi/β¦ suggests there's decent proximal & distal activation at both hip angles during knee extension
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