Podcast 151: Gait and neurology of movement, including, Tightness? shortness? What’s the difference? It's the Neurology.

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Truths about Stretching, a case of sesamoiditis, plus exercised induced muscle damage and impaired motor learning, central fatigue, POSE and Chi running and injuries. This is a good one gang, do not miss it !

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Apple podcasts:
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Other links for today's show:

http://traffic.libsyn.com/thegaitguys/pod_151final.mp3

http://thegaitguys.libsyn.com/gait-and-neurology-of-movement-including-tightness-shortness-whats-the-difference-its-the-neurology

http://directory.libsyn.com/episode/index/id/11168369

Show notes and links:

We lose muscular Strength as we age.
Changes in supra-spinal activation play a significant role in the age-related changes in strength.
This motor system impairment can be improved by heavy resistance training
https://www.ncbi.nlm.nih.gov/pubmed/25940749

Age (Dordr). 2015 Jun;37(3):9784. doi: 10.1007/s11357-015-9784-y. Epub 2015 May 5.
Strength training-induced responses in older adults: attenuation of descending neural drive with age. Unhjem R1, Lundestad R, Fimland MS, Mosti MP, Wang E.

Osteoarthritis and running
https://journals.lww.com/acsm-csmr/Abstract/2019/06000/Running_Dose_and_Risk_of_Developing.5.aspx
Recent literature adds to a growing body of evidence suggesting that lower-dose running may be protective against the development of osteoarthritis, whereas higher-dose running may increase one's risk of developing lower-extremity osteoarthritis. However, running dose remains challenging to define, leading to difficulty in providing firm recommendations to patients regarding the degree of running which may be safe.

Can even experienced orthopaedic surgeons predict who will benefit from surgery when patients present with degenerative meniscal tears? A survey of 194 orthopaedic surgeons who made 3880 predictions
Non-surgical management is appropriate as first-line therapy in middle-aged patients with symptomatic non-obstructive meniscal tears.
https://bjsm.bmj.com/content/early/2019/08/12/bjsports-2019-100567

Sports Biomech. 2019 Jul 31:1-16. doi: 10.1080/14763141.2019.1624812. [Epub ahead of print]
Running biomechanics before and after Pose® method gait retraining in distance runners.
Wei RX1, Au IPH1, Lau FOY1, Zhang JH1, Chan ZYS1, MacPhail AJC1, Mangubat AL1, Pun G1, Cheung RTH1.

Fatigue and muscle activation.

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"Increased muscle activation with decreased movement in a fatigued state may represent an effort to increase trunk stiffness to protect lumbo-pelvic-hip structures from overload"

No rocket science here . . . but good to remember that fatigue sets us all up for injury if one does not observe and listen to the signs of fatigue . . . . especially when athletic and loading demand is increasing rather than tapering at the same time as the fatigue is building. As we fatigue, compensation recruitment is supposed to generate more stiffness to protect the motor units. But, can this be at a cost ?

This study looked at whether fatigue may affect muscle recruitment, active muscle stiffness and trunk kinematics, compromising trunk stability. The purpose of this study was to compare trunk muscle activation patterns, and trunk and lower extremity kinematics during walking gait before and after exercise.

The study used surface EMG to look at the rectus abdominis, external oblique, erector spinae, gluteus medius, vastus lateralis, and vastus medialis in a group of otherwise healthy individuals.

Essentially the study concluded that:
"There was less trunk and hip rotation from initial contact to midstance after exercise. Neuromuscular fatigue significantly influenced the activation patterns of superficial musculature and kinematics of the lumbo-pelvic-hip complex during walking. 
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Gait Posture. 2016 Nov 9;52:15-21. doi: 10.1016/j.gaitpost.2016.11.016. [Epub ahead of print]

Muscle activation patterns of the lumbo-pelvic-hip complex during walking gait before and after exercise.

Chang M1, Slater LV2, Corbett RO1, Hart JM1, Hertel J1.

https://www.ncbi.nlm.nih.gov/pubmed/27846435

Podcast 79: Tightness vs. Shortness, Plantar Fascitis & more.

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plus, pelvic asymmetry, “wearables” and cognitive choices in movement.

This week’s show sponsors: 

www.newbalancechicago.com

www.lemsshoes.com

A. Link to our server: 

http://traffic.libsyn.com/thegaitguys/pod_79f.mp3

Direct Download: 

http://thegaitguys.libsyn.com/podcast-79

B. iTunes link:

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

C. Gait Guys online /download store (National Shoe Fit Certification and more !) :

http://store.payloadz.com/results/results.aspx?m=80204

D. other web based Gait Guys lectures:

www.onlinece.com   type in Dr. Waerlop or Dr. Allen,  ”Biomechanics”

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Today’s Show notes:

The Brain and your choices.

http://exploringthemind.com/the-mind/brain-scans-can-reveal-your-decisions-7-seconds-before-you-decide#.VCx0P8ydUK4.facebook

 
 
Walking is the superfood of fitness, experts say
 
Hey Guys,
I have pelvis asymmetry and a snapping ankle, can you help me with … . 
 
New research on Plantar Fascitis
 
John from FB
Shortness vs tightness:
What protocol do you recommend for stretching ? I usually do static stretches1x2min. This article has the static stretch group doing 10x30sec. I’d have to set my alarm a half hour earlier! :-)