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STUDIO NEWS - The Rotator Cuff

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A Reminder & A Request
The studio schedule is full; so the likelihood that you will come into contact with another client is high. For that reason:
A Reminder: Please wear your mask as you enter & depart the studio to decrease the interaction with another client. Also, please remember to clean the frame of the Tower if you have touched it with your hands or feet.
A Request: Please wait outside the studio till the previous client leaves to limit the interaction between people.
Both of these are purely proactive & protective for all. Your cooperation is appreciated.

Rotator Cuff Muscles - Function & What They Look Like
The Rotator Cuff is made up of 4 muscles: Supraspinatus, which lies on top of the shoulder, the Subscapularis, which lies under the scapula, Infraspinatus, which lies on top of the scapula & the Teres Minor, which lies along the outer border of the scapula to the humerus (arm bone).
The Suprasinatus abducts (moves away) the humerus at the shoulder & works in synergy with all 3 Deltoid muscles (medial, anterior & posterior). It is the rotator cuff muscle that is most commonly torn due to either an acute injury (such as falling, lifting or pulling, or lifting too much overhead) or a chronic tear due to degenerative changes over the years.
The Subscapularis rotates the humerus medially (inward) at the shoulder, working in synergy with several muscles: Anterior Deltoid, Pectoralis, Latissimus Dorsi & Teres Major. Perhaps because it is assisted by so many other muscles, the range of motion (ROM) of the humerus at the shoulder in internal rotation is often greater than that of the external rotation (away from the body).
The Infraspinatus & Teres Minor both create external rotation of the humerus at the shoulder. They are assisted by the Posterior Deltoids. Most people find their ROM in external rotation is more limited that internal rotation, as mentioned above.
Maintaining healthy & strong Rotator Cuff muscles is important because they then allow for a full ROM of the humerus in the shoulder, providing both mobility & stability to the shoulder joint. A tear in any of them can result in surgery &/or physical therapy to rehabilitate them.

 


Exercise, Sleep, Screen Time & Kids
The dangers of not enough exercise or sleep & too much screen time for kids is discussed. Since the article was published in 2019 & most of the research was done prior to 2017, I would assume the screen time has increased significantly due to online learning (if nothing else), and exercise may have decreased with the pandemic.

Newsletter Archive
Remember, you can always find past issues of the newsletter by following this link. You'll never know what stimulating articles you've missed until you do!

Video Highlight - Side Arm Work - Tower
The video depicts the arm movements of the Rotator Cuff muscles discussed above.
To see more videos, visit YouTube & subscribe!
Side Arm Work - Tower
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