Podcast 167: Is symmetry important for biomechanics and energy utilization?

Podcast 167: Is symmetry important for biomechanics and energy utilization? Plus, things that mimic plantar fasciitis. Including trigger points you never thought might be implicated.

This podcast is way more interesting than the title !

join us each month on the Masterclass in Gait

https://www.patreon.com/thegaitguys

Join at the $40 monthly level and get the masterclass each month, bonus material and the detailed monthly content we only share on Patreon.

The Masterclass is a formal LIVE presentation of slides, videos, demos, deep dives on topics you will not hear anywhere but here ! We hit the gait, biomechanics, neurology and orthopedics of all of the gait topics we present. This is not for the weak and timid, this is the deep dive you have been waiting for. Join us while we turn our normal 50 minute presentations into 3.5 hours on a regular basis ! The 40$ Patreon level will give you the Masterclass and also get you the $20, $10, and 5$ Patreon level content. What a deal ! It will not be here forever so lock in now !

Or, you can get less for your money (why would you do that?) and just buy our Monthly $40 Masterclass at our VIMEO on demand page: https://vimeo.com/ondemand/thegaitmasterclass


Links to find the podcast:
Look for us on Apple Podcasts, Google Play, Podbean, PlayerFM, RADIO and more.
Just Google "the gait guys podcast".
_______________________________________________________________________________
Our Websites:
www.thegaitguys.com
Find Exclusive content at: https://www.patreon.com/thegaitguys
doctorallen.co
summitchiroandrehab.com
shawnallen.net

Our website is all you need to remember. Everything you want, need and wish for is right there on the site.
Interested in our stuff ? Want to buy some of our lectures or our National Shoe Fit program? Click here (thegaitguys.com or thegaitguys.tumblr.com) and you will come to our websites. In the tabs, you will find tabs for STORE, SEMINARS, BOOK etc. We also lecture every 3rd Wednesday of the month on onlineCE.com. We have an extensive catalogued library of our courses there, you can take them any time for a nominal fee (~$20).

Our podcast is on iTunes and just about every other podcast harbor site, just google "the gait guys podcast", you will find us.

Where to find us, the podcast Links:
Apple podcasts:
https://itunes.apple.com/us/podcast/the-gait-guys-podcast/id559864138?mt=2

Google Play:

https://play.google.com/music/m/Icdfyphojzy3drj2tsxaxuadiue?t=The_Gait_Guys_Podcast

Links for today's show:

https://traffic.libsyn.com/secure/thegaitguys/167_Dec_4_2020_.mp3

https://thegaitguys.libsyn.com/is-symmetry-important-for-biomechanics-and-energy-utilization

https://directory.libsyn.com/episode/index/id/17322929

Association between trigger points in hamstring, posterior leg, foot muscles and plantar fasciopathy: A cross- sectional study
J Bodyw Mov Ther. 2020 Oct;24(4):373-378. doi: 10.1016/j.jbmt.2020.07.018. Epub 2020 Aug 7. Ravindra C Thummar 1 , Sannasi Rajaseker 2 , Ranjith Anumasa 3


https://physoc.onlinelibrary.wiley.com/doi/abs/10.1113/JP280509
Journal of Physiology.
The human preference for symmetric walking often disappears when one leg is constrained
Michael G. Browne, Cameron S. Smock, Ryan T. Roemmich, Nov 24, 2020

Dynamic arm swinging in human walking.→

It pays, metabolically and biomechanically, to swing your arms! “Experimental measurements of humans (n = 10) showed that normal arm swinging required minimal shoulder torque, while volitionally holding the arms still required 12 per cent more metabolic energy. Among measures of gait mechanics, vertical ground reaction moment was most affected by arm swinging and increased by 63 per cent without it.”

Get the article !

http://www.ncbi.nlm.nih.gov/pubmed/19640879
Proc Biol Sci. 2009 Oct 22;276(1673):3679-88. Epub 2009 Jul 29.

Dynamic arm swinging in human walking.Collins SH, Adamczyk PG, Kuo AD.

Source

Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109-2125, USA. shc@umich.edu

Abstract

Humans tend to swing their arms when they walk, a curious behaviour since the arms play no obvious role in bipedal gait. It might be costly to use muscles to swing the arms, and it is unclear whether potential benefits elsewhere in the body would justify such costs. To examine these costs and benefits, we developed a passive dynamic walking model with free-swinging arms. Even with no torques driving the arms or legs, the model produced walking gaits with arm swinging similar to humans. Passive gaits with arm phasing opposite to normal were also found, but these induced a much greater reaction moment from the ground, which could require muscular effort in humans. We therefore hypothesized that the reduction of this moment may explain the physiological benefit of arm swinging. Experimental measurements of humans (n = 10) showed that normal arm swinging required minimal shoulder torque, while volitionally holding the arms still required 12 per cent more metabolic energy. Among measures of gait mechanics, vertical ground reaction moment was most affected by arm swinging and increased by 63 per cent without it. Walking with opposite-to-normal arm phasing required minimal shoulder effort but magnified the ground reaction moment, causing metabolic rate to increase by 26 per cent. Passive dynamics appear to make arm swinging easy, while indirect benefits from reduced vertical moments make it worthwhile overall.