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07/06/2018

ローテーターカフ筋 4つの覚え方  A formula for memorizing muscle groups in the shoulder rotator

Which exercise is contraindicated for persons with impingement syndrome of the shoulder rotator cuff muscles ?

This is one of discussion topics for a study group of ACSM certified Exercise Physiologist, which I retrieved from their internet site, and the following is my answer which I posted on their site. What I learned newly through this discussion is ... as you can see in my post, how to memorize names of muscles that constitute the shoulder rotator muscles. A key word for it is SITS, which is an acronym of the four muscles in the shoulder rotators,  1), Supraspinatus, 2) Infraspinatus, 3) Teres minor, and 4) Subscapularis.

1), Overview of the rotator cuff muscles and impingement syndrome.
The rotator cuff muscle group is most important in maintaining the humeral head in its proper position within the glenoid cavity. The acronym SITS may be used in learning the names of the supraspinatus, infraspinatus, teres minor, and subscapularis. These muscles must possess not only adequate strength but also a significant amount of muscular endurance to ensure their proper functioning, particularly in repetitious overhead activities such as throwing, swimming, and pitching.
When these types of activities are conducted with poor technique, muscle fatigue, or inadequate warm-up and conditioning, the rotator cuff muscle group fails to stabilize the humeral head in the glenoid cavity, resulting in further rotator cuff problems such as tendinitis and rotator cuff impingement within the subacromial space (Floyd, 2012).

2), Contraindication and recommended exercises for the shoulder impingement syndrome.
Overhead pressing exercises such as shoulder press and all forms of bench press exercise should be used cautiously. The decline bench press stresses this area the least, therefore may be an appropriate exercise choice in reintroduction of the bench press.
The upright row should also be used with caution, as rowing too high (elbows up too high) may exacerbate the impingement type pain.
Clients who have had impingement syndrome should concentrate on continued rotator cuff and scapular exercises. Multiple types of rowing exercises targeting the rhomboids and middle and lower trapezius, especially focused on scapular retraction and depression, are recommended (Coburn & Malek, 2012).

Reference
Floyd, R.T. (2012). Manual of structural kinesiology, eighteenth edition. New York:NY. McGraw Hill.

Coburn, J. W., & Malek, M. H. (2012). NSCA's essentials of personal training, second edition. Champaign:IL. Human Kinetics.

「肩のローテーターマッスルのインピンジメント症候群のあるクライアントに忌避されるべきエクササイズ(おススメできないエクササイズ)は何か?」

これは、ACSM エクササイズ・フィジオロジストの自主勉強グループのサイトで出題された課題トピックの一つです。上記がサイト上に記載した僕の解答です(ご覧のとおり、自分自身の書いた回答をコピペしました 笑)

全文訳すと長くなるので省略しますが、今回、僕が新たに学んだのはローテータカフを構成する4つの筋肉の名前を覚える「公式」があるということです。それは、SITSと言いまして、それら4つの筋肉の英語名を頭文字にしたものです。

S     supraspinatus  (棘上筋)
I     infraspinatus    (棘下筋)
T     teres minor      (小円筋)
S     subscapularis  (肩甲下筋)

英語で試験を受験される方などは、こうすると覚えやすいですよね。 

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