quote:We have all heard ton's of "terms" over the years in baseball from "squish the bug", etc etc. "Scapula Loading" really is just another way of trying to get you into a position of maximum effort and the muscles near/around the scapula don't do anything but SLOW DOWN the efforts of your shoulder and chest muscles to violently throw your arm and shoulder forward. So much for the term, it's a gimmick.
The Scapular Muscles
On your prosected specimens identify the following muscles of the scapular region (Netter, 160, 395-398):
deltoid
supraspinatus
infraspinatus
teres major
teres minor
subscapularis
Identify the borders of the deltoid (Netter, 395). Note that it originates from the lateral third of the clavicle, the acromion and spine of the scapula. It inserts into the deltoid tuberosity of the humerus. The action of the deltoid is abduction of the arm.
The deltoid muscle is innervated by the axillary nerve. The axillary nerve passes posterior to the humerus enroute to the deltoid muscle. The posterior humeral circumflex artery passes along with it to contribute to the blood supply of the deltoid. The axillary nerve also supplies the teres minor muscle. We will identify the nerve later.
The deltoid and trapezius muscles lie superficial to the supraspinatus and infraspinatus muscles. To see these muscles completely you will need a prosection in which the deltoid and trapezius muscles are reflected or removed. Note that the supraspinatus and infraspinatus muscles insert into the greater tuberosity of the humerus. The supraspinatus initiates abduction; the infraspinatus is a lateral rotator of the humerus. These muscles are innervated by the suprascapular nerve
The teres minor muscle lies just below the infraspinatus. It originates from the lateral border of the scapula and inserts into the greater tubercle of the humerus. The teres minor is a lateral rotator; it is also an adductor of the arm.
The teres major originates from the inferior angle of the scapula and inserts into the crest of the lesser tubercle. Teres major is an adductor, medial rotator and extensor. It is innervated by the lower subscapular nerve.
The subcapularis muscle originates from the subscapular fossa of the scapula and inserts into the lesser tubercle of the humerus. It's action is to medially rotate the arm. This muscle is innervated by the upper and lower subscapular nerves.
Four of the scapular muscles contribute to a musculotendinous cuff around the shoulder joint, the rotator cuff. These muscles are the supraspinatus, infraspinatus, teres minor, and subscapularis. There tendons blend with the capsule of the shoulder joint. The rotator cuff muscles help stabilize the shoulder joint by holding the head of the humerus in the glenoid cavity. Have you heard of rotator cuff injuries?
To say that these muscles do not help with velocity would be incorrect in my opinion.
quote:Work on the shoulder muscles, rotator cuff, legs, abs, chest, thighs ... That's were the speed is coming from.
Why work on those and not the scapular muscles. It makes no sense. Why ignore anything just because you don't like the term? I am confused.
