Podcast 103: Effects of Cold on Physiology/Athletes

Using Cold adaptation to your advantage, Walking Rehab “Carries”, Walking and Proprioception.

Show Sponsors:
newbalancechicago.com
Softscience.com

Other Gait Guys stuff

A. Podcast links:

direct download URL: http://traffic.libsyn.com/thegaitguys/pod_103f.mp3

permalink URL: http://thegaitguys.libsyn.com/podcast-103-effects-of-cold-on-physiologyathletes

B. iTunes link:
https://itunes.apple.com/us/podcast/the-gait-guys-podcast/id559864138

C. Gait Guys online /download store (National Shoe Fit Certification & more !)
http://store.payloadz.com/results/results.aspx?m=80204

D. other web based Gait Guys lectures:
Monthly lectures at : www.onlinece.com type in Dr. Waerlop or Dr. Allen, ”Biomechanics”

-Our Book: Pedographs and Gait Analysis and Clinical Case Studies
Electronic copies available here:

-Amazon/Kindle:
http://www.amazon.com/Pedographs-Gait-Analysis-Clinical-Studies-ebook/dp/B00AC18M3E

-Barnes and Noble / Nook Reader:
http://www.barnesandnoble.com/w/pedographs-and-gait-analysis-ivo-waerlop-and-shawn-allen/1112754833?ean=9781466953895

https://itunes.apple.com/us/book/pedographs-and-gait-analysis/id554516085?mt=11

-Hardcopy available from our publisher:
http://bookstore.trafford.com/Products/SKU-000155825/Pedographs-and-Gait-Analysis.aspx

Show Notes:
Cold
Switching on a cold-shock protein may restore lost connections between brain cells & memory function in aging brain.  
http://www.bbc.com/news/health-30812438

-“Connections between brain cells – called synapses – are lost early on in several neurodegenerative conditions, and this exciting study has shown for the first time that switching on a cold-shock protein called RBM3 can prevent these losses.
http://www.pnas.org/content/111/20/7379.abstract

New study in mice in the inaugural issue of Brain Plasticity reports that new brain cell formation is enhanced by running.
http://neurosciencenews.com/neurogenesis-exercise-memory-3165/

Walking changes our mental state, and our mental state changes our walking.  60 sec audio clip.
http://www.scientificamerican.com/podcast/episode/bouncy-gait-improves-mood/

http://www.sciencedaily.com/releases/2015/…/151119122246.htm

Walking. You don’t have to have the pedal to the metal.
"Those who walked an average of seven blocks per day or more had a 36%, 54% and 47% lower risk of CHD, stroke and total CVD, respectively, compared to those who walked up to five blocks per week.”

http://www.sciencedaily.com/releases/2015/…/151119122246.htm
New proprio study:
http://www.nature.com/neuro/journal/v18/n12/abs/nn.4162.html
Piezo2 is the principal mechanotransduction channel for proprioception
Seung-Hyun Woo et al,
Nature Neuroscience 18, 1756–1762 (2015) doi:10.1038/nn.4162Received 14 July 2015 Accepted 13 October 2015 Published online 09 November 2015

Magnesium intake higher than 250 mg/day associated with a 24% increase in leg power & 2.7% increase in muscle mass.
http://onlinelibrary.wiley.com/doi/10.1002/jbmr.2692/full

Dietary Magnesium Is Positively Associated With Skeletal Muscle Power and Indices of Muscle Mass and May Attenuate the Association Between Circulating C-Reactive Protein and Muscle Mass in Women

Ailsa A Welch et al.
http://www.readcube.com/articles/10.1002%2Fjbmr.2692?r3_referer=wol&tracking_action=preview_click&show_checkout=1&purchase_referrer=t.co&purchase_site_license=LICENSE_DENIED

Gray Cook
https://duker2p.wordpress.com/2015/11/16/illuminating-insights-gray-cook-part-1/

Carries, lots of carries
https://www.facebook.com/otpbooks/videos/1004044686323688/

Pod #93: Ankle Rocker, Sacroiliac Joint symmetry , Landing mechanics

Ankle Rocker, Sacroiliac Joint symmetry , Landing mechanics, Gait Tech, Gray Cook theories, movement and music and so much more !

A. Link to our server:
http://traffic.libsyn.com/thegaitguys/pod_93Final.mp3

Direct Download:  http://thegaitguys.libsyn.com/pod-93-ankle-rocker-sacroiliac-joint-symmetry-landing-mechanics

Sponsor: www.newbalancechicago.com

-Other Gait Guys stuff
B. iTunes link:
https://itunes.apple.com/us/podcast/the-gait-guys-podcast/id559864138
C. Gait Guys online /download store (National Shoe Fit Certification & more !)
http://store.payloadz.com/results/results.aspx?m=80204
D. other web based Gait Guys lectures:
Monthly lectures at : www.onlinece.com type in Dr. Waerlop or Dr. Allen, ”Biomechanics”

-Our Book: Pedographs and Gait Analysis and Clinical Case Studies
Electronic copies available here:

-Amazon/Kindle:
http://www.amazon.com/Pedographs-Gait-Analysis-Clinical-Studies-ebook/dp/B00AC18M3E

-Barnes and Noble / Nook Reader:
http://www.barnesandnoble.com/w/pedographs-and-gait-analysis-ivo-waerlop-and-shawn-allen/1112754833?ean=9781466953895

https://itunes.apple.com/us/book/pedographs-and-gait-analysis/id554516085?mt=11

-Hardcopy available from our publisher:
http://bookstore.trafford.com/Products/SKU-000155825/Pedographs-and-Gait-Analysis.aspx

Show notes:

-Landing mechanics
http://www.ncbi.nlm.nih.gov/pubmed/26117159

-Shock absorbing landing loads
J Athl Train. 2015 Jun 11. [Epub ahead of print]
Weight-Bearing Dorsiflexion Range of Motion and Landing Biomechanics in Individuals With Chronic Ankle Instability. Hoch MC1, Farwell KE1, Gaven SL2, Weinhandl JT1.

-Neuroscience:
Trying to reteach your client’s CNS new sensory-motor patterns so they can move better ?
New connections and pathways are fragile and only through repetition and practice and focused attention can those connections be established enough to become habitual or default behaviors.
Neuroscience for Leadership: Harnessing the Brain Gain Advantage (The Neuroscience of Business). Tara Swart

-Does variability in muscle activity reflect a preferred way of moving or just reflect what they’ve always done?
http://esciencenews.com/articles/2014/03/14/motion.and.muscles.dont.always.work.lockstep.researchers.find.surprising.new.study

-Context-dependent changes in motor control and kinematics during locomotion: modulation and decoupling. Foster and Higham
http://www.ncbi.nlm.nih.gov/pubmed/24621949

-gait technology problems 😕
http://www.buzzfeed.com/stephaniemlee/who-owns-your-steps#.twn1Bg28P

-Dance video discussed, Alvin Ailey Dance Company
https://vimeo.com/36286106

-SI joint anatomy/rehab piece: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3512279/
more rehab strategies here: http://lermagazine.com/article/music-therapy-and-gait-rehab-to-a-different-beat

-a few minutes on Gray Cook quotes. pick a few we can talk about (pic attached)

movement patterns talk: http://www.anatomy-physiotherapy.com/28-systems/musculoskeletal/lower-extremity/knee/1191-altered-movement-patterns-in-individuals-with-acl-rupture

Cross Fit: Gray Cooks thoughts

Always a good read, he is always on the mark.
Gray Cook talks about CrossFit, injury rates, and protecting both elite and amateur level CrossFit athletes.
We couldn’t agree more about the fact that CrossFit often prioritizes reps and time which can lead to fatigue and compensation in lifters, often corrupting and even neglecting technique. (yes, not everyone and not ever cross fit gym, but enough that its worthy of dialogue).
https://www.t-nation.com/t…/how-to-prevent-crossfit-injuries

“Postures must have integrity. Patterns must have economy.”

We love Gray Cook’s memes.

“Postures must have integrity.  Patterns must have economy.”

This one is a keeper…….we would like to add that “patterns must have economy AND capacity”.

We have talked about central fatigue here on FB and our blog, and it has alluded to the fact that neuromuscular motor patterns are driven centrally from the CPG’s (central pattern generators in a few areas of the brain). Metabolic capacity problems can alter motor patterns, so fatigue can come centrally as well as peripherally at the muscle, which we typically think of when we think of fatigue. The brain has a metabolic demand as well, and if it hits a “fuel” limitation (cerebral hypometabolism) the movement driven from that path will be corrupt. Craig Liebenson refers to muscle “amnesia”, perhaps this is what he is alluding to, it is a central fuel capacity fatigue issue to be more precise. Here at The Gait Guys we like to say you better have S.E.S. (skill, endurance, strength). The endurance is a local and a central fuel endurance thing. Thanks Gray ! Move well, move often.

Shawn and Ivo

the gait guys

_______

“Human muscle fatigue does not simply reside in the muscle”.

So you like to “activate” clients muscles huh? Its the big flashy trend right now done by some folks who know very little about what they are doing and perhaps adding risk to athletes right before an event or practice.
How much do you really know what you are doing ?
Have you heard of “central fatigue” and the neural mechanisms underlying it? Do you think that merely “activating” your client will make them safe and perform better on the field ? What if it added even more risk to their system ? If you are only driving the changes at the end organ, the muscles and their receptors, you may not even be half way there. Read on … .

“Muscle fatigue is an exercise-induced reduction in maximal voluntary muscle force. It may arise not only because of peripheral changes at the level of the muscle, but also because the central nervous system fails to drive the motoneurons adequately. Much data suggest that voluntary activation of human motoneurons and muscle fibers is suboptimal and thus maximal voluntary force is commonly less than true maximal force. Hence, maximal voluntary strength can often be below true maximal muscle force. The technique of twitch interpolation has helped to reveal the changes in drive to motoneurons during fatigue. Voluntary activation usually diminishes during maximal voluntary isometric tasks, that is central fatigue develops, and motor unit firing rates decline.Transcranial magnetic stimulation over the motor cortex during fatiguing exercise has revealed focal changes in cortical excitability and inhibitability based on electromyographic (EMG) recordings, and a decline in supraspinal “drive” based on force recordings. Some of the changes in motor cortical behavior can be dissociated from the development of this “supraspinal” fatigue. Central changes also occur at a spinal level due to the altered input from muscle spindle, tendon organ, and group III and IV muscle afferents innervating the fatiguing muscle. Some intrinsic adaptive properties of the motoneurons help to minimize fatigue. A number of other central changes occur during fatigue and affect, for example, proprioception, tremor, and postural control. Human muscle fatigue does not simply reside in the muscle.”

Hopefully stuff like this ruffles some feathers, raises eyebrows and questions, starts deeper meaningful dialogues, forces people to understand their scope and pay grade, and forces us all to ask harder questions especially when things seems easy and too good to be true. There is no finger pointing here dear brethren, so no need to retaliate or raise up arms to defend a position. Just read the research and ask yourself the tough questions…… “am i part of the solution, or part of the problem”? We can all do better, lets all raise up and step up, and elevate the professions together. It can only make it better for those that need it, our clients and patients.

Physiol Rev. 2001 Oct;81(4):1725-89.
Spinal and supraspinal factors in human muscle fatigue.
Gandevia SC