Pod 144: Grounded running, Glute fatigue & Stress Fractures

Topics: Grounded running, Glute fatigue, Stress Fractures, Duty Factor, Ankle stiffness & Gait and Concussions

Keywords: gait, gait analysis, gait problems, running, ankle, band, concussions, fatigue, fracture, gait, glutes, grounded, gait guys, glute medius, problems, stiffness, stress, syndrome, time under tension

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Show notes:

Hip muscle response to a fatiguing run in females with iliotibial band syndrome.
Brown AM1, Zifchock RA2, Lenhoff M3, Song J4, Hillstrom HJ3.
Hum Mov Sci. 2019 Feb 8;64:181-190. doi: 10.1016/j.humov.2019.02.002. [Epub ahead of print]

Balance and Gait Alternations Observed More than 2 Weeks after Concussion: A Systematic Review and Meta-analysis.
Wood TA1, Hsieh KL1, An R1, Ballard RA2, Sonoff JJ1.
Am J Phys Med Rehabil. 2019 Feb 5. doi: 10.1097/PHM.0000000000001152. [Epub ahead of print]

Does Running Faster Put You at Greater Risk of a Stress Fracture?
New research finds that speed might not cause as much strain on the shins as we thought
By Hailey Middlebrook
Feb 12, 2019
https://www.runnersworld.com/health-injuries/a26221848/stress-fracture-speed-study/

Fast Running Does Not Contribute More to Cumulative Load than Slow Running\
Hunter, Jessica G.1; Garcia, Gina L.1; Shim, Jae Kun1,2,3; Miller, Ross H.1,2
Medicine & Science in Sports & Exercise: January 25, 2019

https://journals.lww.com/acsm-msse/Pages/articleviewer.aspx?year=9000&issue=00000&article=96699&type=Abstract

Grounded running Reduces Musculoskeletal Loading.
https://www.ncbi.nlm.nih.gov/pubmed/30480615
Med Sci Sports Exerc. 2018 Nov 21
Bonnaerens S1, Fiers P1, Galle S1, Aerts P1,2, Frederick EC3, Kaneko Y4, Derave W1, De Clercq D1.

Duty factor:
duty-factor. The duration of a gait cycle where each foot is on the ground
https://www.researchgate.net/figure/Illustration-of-the-duty-factor-The-duration-of-a-gait-cycle-where-each-foot-is-on-the_fig2_221908232

Ankle intrinsic stiffness changes with postural sway
PouyaAmiri, Robert E.Kearney
https://www.sciencedirect.com/science/article/pii/S0021929019300387

Glute fatigue in low back pain.

Sagittal trunk flexion and extension in patients with chronic low back pain.

The study found the duration of gluteus maximus activity was shorter in the back pain patients than in controls during the trunk flexion (p<.05), and it ended earlier during extension. Nothing new here for many of our followers, but it is always worth discussing.

We have talked about the fatigue factor and endurance factor of the paraspinals in low back pain in previous podcasts, maybe a year or two ago. But, in looking for something else in particular today, I came across this article from 2000.
It once again suggests the critical function of the glutes, all 3 divisions and that they do play multiple parts other than just hip stability and movement. We see plenty of clients who have poor development of the upper iliac and sacral divisions of the glute max. This could be from anterior pelvis tilt presentations, faulty movement patterning, or even failure to get to end range hip extension to work on developing that portion of the muscle. Regardless, this once again proves that we are an under-developed glute species and all this sitting is a problem, and even the standing desk trend, will not fix this. The body must move, it must be loaded through to the full range of motion and we must incorporate compound movements with load if we are to get even close to the opportunity to see folks with healthy glutes and thus healthy hips and spines.

"RESULTS:
During early flexion, lumbar paraspinal and biceps femoris were activated simultaneously before gluteus maximus. At the end of flexion and during extension all investigated muscles were activated and relaxed in order. Lumbar paraspinal and biceps femoris muscles were activated in a similar order in low back pain patients and healthy controls during flexion and extension. However, the duration of gluteus maximus activity was shorter in the back pain patients than in controls during the trunk flexion (p<.05), and it ended earlier during extension. Active rehabilitation did not change the muscle activities of lumbar paraspinal and biceps femoris in the back pain patients, but in the measurements after rehabilitation the onset of gluteus maximus activity occurred later in flexion and earlier in extension."

"CONCLUSIONS:
The activity of the gluteus maximus muscle during the flexion-extension cycle was reduced in patients with chronic low back pain. The gluteal muscles should be taken into consideration in the rehabilitation of these patients." - Leinonen et al

Arch Phys Med Rehabil. 2000 Jan;81(1):32-7.
Back and hip extensor activities during trunk flexion/extension: effects of low back pain and rehabilitation.

Leinonen V1, Kankaanpää M, Airaksinen O, Hänninen O.
https://www.ncbi.nlm.nih.gov/pubmed/10638873