Tendon Talks

Listen in today as we sit down with Nixon Dorvilien and Bendu Yeaney to discuss achilles injuries, specifically in the sport of basketball.

Transcript: docs.google.com/document/d/1k8zQC…/edit?usp=sharing

– Ground Reaction Forces in Distance Running by Peter R. Cavanagh
– A Profile of Ground Reaction Forces in Professional Basketball by Irene S. McClay
– Achilles Tendon Rupture: A Review of Etiology, Population, Anatomy, Risk Factors, and Injury Prevention by Gregory William Hess

The Present and Future Implications of Advanced Prosthetic Limbs in Sports

In this podcast, my guests and I get into detailed discussion and debate on prosthetic limb use in modern-day, and future Paralympic and Olympic sport. We discuss the intricacies of the biomechanics of these devices, and we have ethical discussions as to what should and should not be allowed in sport. Furthermore, we expand our discussion to neurological implants, and their connection to advanced prosthetic limbs, finishing with a discussion of the implications of these devices to the future of society.

Show Notes: 


Swimming is not a Drag with Dr. Carl Payton

Today on Biomechanics in the Wild, we will be talking with Dr. Carl Payton, a Professor of Sports Biomechanics at Manchester Metropolitan University in Manchester, England. He researches the movement of paraswimmers and is currently working with a team to develop a new classification system for the International Paralympics Committee. He also serves as a support scientist for Great Britain’s Olympic and Paralympic swimming teams.

Paraswimmers are allocated different classifications depending on their disability. Swimmers with a motor coordination, mobility, or limb deficiency are split into rankings S1 through S10, with S10 being those swimmers with the least level of impairment. Swimmers with a visual impairment (S11-S13) or a intellectual disability (S14) are also split into different classes. The goal of this system is to allow the swimmers to compete with swimmers of a similar ability level, to create a level competition field. 

Further Resources:

A transcript of the show can be found at tinyurl.com/BWILDparaswimming.

The book that sparked Dr. Payton’s interest in sports biomechanics is “The Biomechanics of Sports Techniques” by James G. Hay [ISBN: 978-0130845344].

The on-land motion capture system that we were discussing utilizes reflective spheres on a dark background to track an individual’s motion. The platform that Dr. Payton mentioned is Vicon [www.vicon.com]. The underwater motion capture system that Dr. Payton discussed is Miqus Underwater (Qualisys, Göteborg, Sweden).

For further information on the subjectivity of the current classification system, please see either Sports Illustrated’s article “Will Cheating Ruin the Paralympic Games?” [Robert Sanchez] or Burkett et al. 2018 “Performance Characteristics of Para Swimmers: How Effective is the Swimming Classification System?”.

For further information on the different classification levels, please see this brief article describing the levels from the International Paralympic Committee [www.paralympic.org/swimming/classification].

Dr. Carl Payton’s email is c.payton@mmu.ac.uk. The research associate that is working closely with him on this project is Dr. Dawn O’Dowd (d.odowd@mmu.ac.uk). Dr. Brendan Burkett who is the co-investigator on the paraswimming re-classification study is a Professor of Sport Science at the University of the Sunshine Coast in Queensland, Australia (bburkett@usc.edu.au). He is also the Head Coach of the Australian Paralympic Swim Team. Dr. Luke Hogarth (lhogarth@usc.edu.au) is a Postdoctoral Research Fellow who is working closely with Dr. Burkett on the evidence-based classification system.

For further reading on the research of Dr. Payton and his team, as well as other resources on the topic please see the below document for articles.

Egan Mills and Blake Kusky Discuss Eccentric vs Concentric Weight Training

Bodily movement without eccentric and concentric motion is impossible. When it comes to weight/strength training, the portion of the movement that tends to be more focused on is the concentric portion. In this analysis, the effects of both eccentric and concentric weight/strength training will be fully fleshed out with both their positive and negative results.

Transcript and Shownotes:


Growth in Growing Heart Valves

Take a look at the biology, anatomy, and the mechanics of the heart, and learn about the current state of replacement heart valve technology.





Runner’s High (with guest speaker Emily Nist)

A discussion about the biomechanics behind running at altitude, including the effects of altitude on the body, how to combat it, and how to utilize it to enhance running performance.

Sources taken from (Levine et al., 1997), (Mazzeo, 2008), (Naeje, 2010), and (Hinckson et al., 2005).



The Fastest Animal in the World?

The Dracula Ant or Mystrium Camillae is the fastest animal in the world thanks to its spring loaded snap which travels over 200 miles per hour or 90 meters per second. In this video we briefly explore how this is possible.


Jaws That Snap: Control the Mandible Movements in the Ant Mystrium by Wulfila Gronenberg, et al.

Latch-Based Control of Energy Output in Spring Actuated Systems by Sathvik Divi, et al.

Snap-Jaw Morphology Is Specialized for High-Speed Power Amplification in the Dracula Ant, Mystrium Camillae by Fredrick J. Larabee, et al.

Footage from Videezy

Pictures by April Nobile

Pictures by April Nobile

Pictures by Bernard DUPONT

Pictures by Andreas Kay

Pictures by Steven Miller

Pictures by April Nobile

Pictures by April Nobile

Pictures by April Nobile

Pictures by Darryl Moran

Growth under Pressure, forces working to constrain size

Allometry and different constraints on the size of land and sea mammals are discussed in this video. A brief explanation of allometry as well as thermoregulation in sea mammals is described in the video.


Biomechanical Consequences of Scaling by Andrew A. Biewener

Biomechanics and Energetics in Aquatic and Semiaquatic Mammals: Platypus to Whale by Frank E Fish

Body Size and Temperature: Why They Matter by Carlos Martinez del Rio and William H. Karasov

Slipping or Tripping? Researchers Find Best Way to Regain Your Balance

Everyone has slipped or tripped at some point in their lives. Whether it is walking on an icy road to get to your car or tripping over the Lego set your kid refused to put away, everyday obstacles can cause us to lose our balance. Often this results in a brief moment of panic followed by the uneasy relief of regaining your footing, but for those who aren’t lucky enough to avoid falling, the results can be devastating. This is especially prevalent in populations more susceptible to falling. Falling in the workplace accounts for 16.8% of all non-fatal injuries leading to days taken off work. It is thought that this is due to the high volume of slipping or tripping obstacles encountered in some occupations. Additionally, 36 million falls resulting in 32,000 deaths were reported for the 65+ year old population of the US (Bruijn et. al 2022). Elderly individuals may lack the strength and reflexes necessary to recover their balance quickly. This is especially worrisome because the elderly are also the most at risk for the major health complications that can be caused by fall related injuries.

Continue reading “Slipping or Tripping? Researchers Find Best Way to Regain Your Balance”

Why Do Your Fingers Make A “Pop” Noise When You Crack Your Knuckles?

When cracking your knuckles, one tends to hear a “pop” noise that is loud, sharp, and irritating to most. This noise can be addicting in the sense that it makes others want to crack their knuckles. The main questions that I focused my research on were “Does cracking your knuckles or joints cause potential health issues for your future?” and “ Why does cracking a joint such as your knuckles make a “pop” noise?” 

Continue reading “Why Do Your Fingers Make A “Pop” Noise When You Crack Your Knuckles?”