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The rear delt raise, also known as the rear deltoid raise, or rear shoulder raise is an exercise in weight training. This exercise is an isolation exercise that heavily works the posterior deltoid muscle. The movement is primarily limited to the two shoulder joints: the glenohumeral joint and the scapulothoracic joint. Scapular movement will also cause movement in the sternoclavicular joint and acromioclavicular joint. If the elbow bends during the extension exercises, it gravitates into a rowing motion. ==Transverse forms== Movements for the posterior deltoid done in the transverse plane are also referred to by terms like rear delt fly, reverse fly, rear lateral raise, bent-over lateral raises or other variations. Other muscles that aid the posterior deltoid include the two lateral rotators of the rotator cuff: the infraspinatus and teres minor. Other muscles such as the lats and middle delts can also come into action, dependent on how the shoulder is rotated. To execute the exercise, the weightlifter attains a prone rib cage position. This is usually done by standing and bending over, or by laying face-down on a bench. Flat is ideal, though slight inclines can also be used. The arms hang straight down. The goal is to bring the arms to the side away from the body at a 90 degree angle. While leverage is most difficult with fully extended elbows, a slight bend is useful as it allows the lifter to maintain awareness of this. This movement is commonly done using dumbbells to add resistance to the weight of the arms. It is mostly a joint isolation movement of the shoulder. During the transverse lifts, the scapulae will also articulate and adduct/retract as the weights lift, then abduct/protract as the weights are lowered. Some lifters will retract the scapulae and hold them there, as opposed to letting them protract, to get a better stretch in the posterior deltoid. Muscles that retract the scapulae include the rhomboid muscle and the trapezius muscle. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rear delt raise」の詳細全文を読む スポンサード リンク
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