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Mike Schofield
383 posts

Mike Schofield
@rotationalperf
T&F throws biomechanics and S&C. MPhil - power training for golf, PhD - biomechanics and physiology of track and field throwing
Katılım Mart 2016
395 Takip Edilen433 Takipçiler

great insights into one of the sharpest minds in track and field/strength and conditioning/power physiology. @ColmBourkeLJ nice podcast!! podcasts.apple.com/nz/podcast/the…
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Thanks to @JustFlySports for a great chat around performance and training. Really enjoyed sharing thoughts and ideas! podcasts.apple.com/nz/podcast/jus…
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I’ve been fortunate to have some great conversations with some cool people. Sharing thoughts and ideas. podcasts.apple.com/nz/podcast/swe…
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I shared this on LinkedIn. Some of my thoughts around my approach to coaching in competition……the take home…….I don’t coach in competition…..I try to get out of the way linkedin.com/posts/michael-…
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@chrislongphd @spikesonly @Scott_Damman Late eccentric and early concentric RFD across countermovement jump, bench throw and bench pull (across loads of 0-60kg) tracks poorly with elite throwing (shot, hammer, disc) performance and correlates poorly too
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@spikesonly @Scott_Damman Agree, ultimately the best training will always be the action itself. The skill/challenge in coaching is varying and manipulating the task and constraints to optimally challenge and develop the action
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RFD, conclusion on page 62 + 👍info!
"...coaches must be aware of the importance of RFD at early time intervals...this parameter should be measured during functional tests...because of its relationship with several sports movements."
ref:eurjhm.com/index.php/eurj…
#ForceSequence
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@EamonnFlanagan @ActivateGlutes Agree, I saw this earlier and was a little confused, but still need to read in full.
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Why define a misconception? Won't this just help the 'functional' gurus with their advertising?
Brad Schoenfeld, PhD@BradSchoenfeld
"Functional training" is one of the most misused terms in the fitness field. Honored to have been a collaborator on this consensus paper that sought to provide clarity on the concept 💪 tandfonline.com/eprint/UA6QUR4…
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@KBurola @ActivateGlutes @Duhigs @EamonnFlanagan @1080motion A lot use them due to history/there perceived predictive ability. That said you don’t need to use them as @EamonnFlanagan said they drive general adaptations due to the high forces experienced. There are other ways to create the same strains that will drive similar adaptations
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@ActivateGlutes @Duhigs @EamonnFlanagan @1080motion What are your thought on heavy hip thrusts? Non vertical exercise. Nobody seems to talk about them.
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@lahti_johan Have a search of motion dependent torques. Should help with understanding some of this
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The energy flow in a sprint start, also likely one reason why the RDL is a favorite of many sprint coaches. It strengthens the lumbosacral extensors at the same time as the hip extensors, thus providing force closure strength at the pelvis so that the thigh can rotate in peace without pulling into posterior pelvic tilt.
The figure below if from the discussion of Sado et al @ns19910626 sprint start energy flow paper, very interesting.. Still trying to rap my head on energy flow in biomechanics as we didnt really learn this in school. Any good educational videos on this?
onlinelibrary.wiley.com/doi/10.1080/17…

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@WSWayland Is this taken from a single camera? If so it’s a nice graphic but as the graphic shows it suggests the error in these modalities is significant as the model dislocates

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@TheDavidWeck @EatSleepTrain_ The long jump example and this are slightly seperate in the fact the force during sprinting g acts largely back through the COM and not at a radii so rotation is unlikely to occur. My former comment was a bit more hypothetical in nature around applying the same concept.
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@rotationalperf @EatSleepTrain_ Everyone is slowing down after 80 meters from an energy standpoint. So the forces are diminishing past that point - but the braking force on the feet still “induces acceleration” of the CoM forward and down. I think.
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Looks to me like “the braking force acting upon his feet” ACCELERATES his Center of Mass Up.
Doesn’t look to me like his CoM is slowing down at/after the feet “brake” on the ground.
What do you see?
Now… Thought experiment.
Do you THINK “the braking force acting upon the foot” of a sprinter ACCELERATES their CoM OR slows the CoM down.
Don’t forget the only thing your CoM is doing in the air is SLOWING DOWN.
Does anyone think it might be a good idea to ask questions like this (rather than let the word “braking” automatically be “bad”).
Based upon unequivocal evidence, I have zero faith in “Exercise scientists” to lead the way forward. They’re to STIFF to teach balance, and too stubborn to accept what’s actually true.
I’m not afraid to be wrong… which is why I’m so fundamentally right.
Science is not religion.
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@TheDavidWeck @EatSleepTrain_ Jumpers then have to manage this in the air. In sprinting however, forward rotation would need to be offset to stay upright. I’m not sure the propulsive forces are orientated to manage forward rotation over many steps while continuing to apply high forces?
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Thinking about the polevault as well. The breaking force acting upon the pole which acting upon the hands up top, accelerates the lower body forward, and up. If the pole didn’t bend, the body would go from vertical to horizontal feet first extremely quickly. Perhaps when a longitudinal structure is moving upright horizontally, a breaking force at the distal end will accelerate the rest of the structure forward and down or forward and up, depending upon where the breaking force is applied. Just thinking out loud.
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@TheDavidWeck @EatSleepTrain_ I think what you’re referring to here is what in biomechanics is called “induced acceleration” aka acceleration that is the result of system versus the segment. This occurs in long jump, the result of planting infront of the COM is rotation (catapulting action)
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