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โครงการพัฒนาหนังสออเล็กทรอนกสเฉลมพระเกียรต สมเด็จพระเทพรตนราชสดาฯ สยามบรมราชกุมาร ี
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Transverse arm adduction and abduction
Transverse Primarily isometric Primarily isometric Concentric pectoralis /
adduction latissimus / lower deltoids to hold the anterior deltoid
trapezius to hold arm up at shoulder
the buoyancy height.

underwater.
Concentric Concentric pectora-
pectoralis / lis/
anterior deltoid anterior deltoid from

from the drag the drag
resistance resistance

Transverse Primarily isometric Primarily isometric Concentric posterior
abduction latissimus / lower deltoids deltoids/ infraspinatus
trapezius to hold to hold the arm up / teres minor

the buoyancy at shoulder
under water. height.
Concentric Concentric posterior
posterior deltoid deltoids / infraspina-

/infraspinatus / tus / teres minor
teres minor from from the drag resist-
the drag resist- ance
ance

Front arm raise

Flexion of the Eccentric posteri- Concentric anterior Concentric anterior deltoid/

arm or deltoid/ deltoid /pectoralis / pectoralis / biceps brachii
latissimus / biceps brachii
triceps

Extension of the Concentric posterior Eccentric anterior deltoid / Concentric posterior deltoid
arm deltoid /latissimus/ pectoralis / biceps brachii / latissimus / triceps
triceps

การออกก�าลังกาย 82