Biomechanics References on Tennis Strokes

[yossarian]

This publication looks interesting for shoulder injury information. Reading.

link

Rotator Cuff Injuries in Tennis Players - PMC

This review presents epidemiology, etiology, management, and surgical outcomes of rotator cuff injuries in tennis players. Rotator cuff injuries in tennis players are usually progressive overuse injuries ranging from partial-thickness articular- or ...

www.ncbi.nlm.nih.gov

“The etiology of rotator cuff tears in tennis players is multifactorial and usually results from microtrauma and internal impingement in the younger athlete leading to partial tearing and degenerative full-thickness tears in older players.”

Same thing in this article. Shocking

 

[Chas Tennis]

The importance of this information here is to eventually learn if there is a new recommendation for the shoulder motion or orientation during the tennis serve.


Research status on Internal Shoulder Impingement vs Subacromial Impingement, 2015

Shoulder motion during tennis serve: dynamic and radiological evaluation based on motion capture and magnetic resonance imaging

• Caecilia Charbonnier,
• Sylvain Chagué,
• Frank C. Kolo &
• Alexandre Lädermann

International Journal of Computer Assisted Radiology and Surgery volume 10, pages1289–1297 (2015)

Pubmed abstract but online publication is not free.

Shoulder motion during tennis serve: dynamic and radiological evaluation based on motion capture and magnetic resonance imaging - International Journal of Computer Assisted Radiology and Surgery

Purpose Rotator cuff and labral lesions in tennis players could be related to posterosuperior internal impingement or subacromial impingement during tennis serve. However, it is unknown which of these impingements are responsible for the lesions found in the tennis player’s shoulder. Moreover...

link.springer.com

Purpose
Rotator cuff and labral lesions in tennis players could be related to posterosuperior internal impingement or subacromial impingement during tennis serve. However, it is unknown which of these impingements are responsible for the lesions found in the tennis player’s shoulder. Moreover, there is a lack of validated noninvasive methods and dynamic studies to ascertain impingement during motion.


If you use GOOGLE SCHOLAR you might find a publication available free on line. It is listed to the right.

Google Scholar

Google Scholar provides a simple way to broadly search for scholarly literature. Search across a wide variety of disciplines and sources: articles, theses, books, abstracts and court opinions.

scholar.google.com

Free online

https://artanim.ch/pdf/publications/39.pdf

For interested readers, to search for additional publications - that are much more creditable that any other available information - look at the publication's references for other publications. You can then see the research that preceded a publication. To search for any publications on future dates, search the authors.

Another collection of free publications to always check and search is the NCBI PMC collection.

National Center for Biotechnology Information

www.ncbi.nlm.nih.gov

 

[yossarian]

Research status 2015.

Shoulder motion during tennis serve: dynamic and radiological evaluation based on motion capture and magnetic resonance imaging

• Caecilia Charbonnier,
• Sylvain Chagué,
• Frank C. Kolo &
• Alexandre Lädermann

International Journal of Computer Assisted Radiology and Surgery volume 10, pages1289–1297 (2015)

Pubmed abstract but online publication not free.

Shoulder motion during tennis serve: dynamic and radiological evaluation based on motion capture and magnetic resonance imaging - International Journal of Computer Assisted Radiology and Surgery

Purpose Rotator cuff and labral lesions in tennis players could be related to posterosuperior internal impingement or subacromial impingement during tennis serve. However, it is unknown which of these impingements are responsible for the lesions found in the tennis player’s shoulder. Moreover...

link.springer.com

Research on Internal Shoulder Impingement vs Subacromial Impingement, 2015

Purpose
Rotator cuff and labral lesions in tennis players could be related to posterosuperior internal impingement or subacromial impingement during tennis serve. However, it is unknown which of these impingements are responsible for the lesions found in the tennis player’s shoulder. Moreover, there is a lack of validated noninvasive methods and dynamic studies to ascertain impingement during motion.

If you use GOOGLE SCHOLAR you might find the publication available free on line.

Free online

https://artanim.ch/pdf/publications/39.pdf

Results
Simulation showed that internal impingement was frequently observed compared to subacromial impingement when serving. The computed zones of internal impingement were mainly located in the posterosuperior or superior region of the glenoid. These findings were relevant with respect to radiologically diagnosed damaged zones in the rotator cuff and glenoid labrum.

Conclusions
Tennis players presented frequent radiographic signs of structural lesions that seem to be mainly related to posterosuperior internal impingement due to repetitive abnormal motion contacts.

Seems to be a pattern, huh?

 

[Chas Tennis]

References on shoulder impingement. Will add to these references.
1)

Management Options for Shoulder Impingement Syndrome in Athletes: Insights and Future Directions

2) https://www.denversportsortho.com/i...he-shoulder-orthopedic-surgeon-denver-co.html

3) https://www.orthobullets.com/shoulder-and-elbow/3054/internal-impingement

4) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3625798/

5) Reference 23) of PMC3625798, earlier research.
Abstract of Internal Shoulder Impingement 1999. https://scholar.google.com/scholar_...cation_year=1999&pages=253-258&pmid=10231101&

6)

 

[Chas Tennis]

Effective Functional Progressions in Sport Rehabilitation (2009)
T. Ellenbecker, M. DeCarlo, C. DeRosa

Pg 38 has a section on "Posterior, Internal, or Undersurface Impingement".

This is described and the history of earlier research is given. It is Internal Shoulder Impingement as we have been discussing.

Internal Shoulder Impingement involves extreme External Shoulder Rotation and Abduction.

The Ellenbecker video "Rotator Cuff Injury" deals with limiting Abduction throughout the service motion.

The video is available to members as one of the Tennis Resources videos.

If there are similar creditable sources with recommendations on how to hold the upper arm during the serve, please post.

 

[Chas Tennis]

Relative to Titin the rubber band in our muscles.

Herzog, Dr. Walter – ASTech Awards

Alberta Science, Technology, and Leadership Awards - Industry, Government, Academia, and Entrepreneurs working together and Inspiring Innovation for over 30 years. Best of All Worlds. Get Involved Now.

www.astech.ca

Be on the look out for publications that might describe the role of Titin in the stretch shorten cycle.

 

[Chas Tennis]

Sports Biomechanics Lecture Series | Dr Stuart McErlain-Naylor

Sports Biomechanist

www.stuartmcnaylor.com

See Walter Herzog lecture for Titin - the microscopic spring in your muscle's sarcomere. Titin is what makes the stretch-shorten cycle work.

See Bruce Elliott for a lecture on tennis biomechanics that uses the serve and forehand as examples. Emphasis on the significance of certain sub-motions.

 

[Chas Tennis]

Two muscle forces act to shorten muscles
1) "Actives Forces" involving Actin & Myosin
2) "Passive Forces" involving Titin. (see Stretch Shorten Cycle)

This reference outlines force, muscles and contraction speeds.

9.3A: Force of Muscle Contraction

med.libretexts.org

I have been searching for a discussion of muscle forces vs shortening speed that has been applied to tennis strokes. Please post if you find anything.

The Titin can probably provide forces at higher shortening speeds. It would be enlightening to see Active Forces vs Passive Forces applied to tennis strokes as a function of shortening speed.