Major Muscles and Actions Involved in the Bent-Over Dumbbell Row
Posted by Allen Continanza on December 04, 2020 . 0 Comments
The bent-over dumbbell row with both the neutral and pronated grips is a good substitute for the seated row for developing almost all of the back musculature. In this exercise you do not have to contend with the upper body moving forward and back.
Variant 1: Neutral grip
This variant involves shoulder joint extension, in which the lower pectoralis major, the lower latissimus dorsi, and the teres major participate. The action is assisted by the posterior deltoid. In this action your elbows move from a position in front of your body down and back until they are behind your trunk.
Downward rotation and adduction of the scapulae occur in the shoulder girdle when your arms go beyond the level of your back. In this action the lower edges of the scapulae turn inward toward the spine while the upper edges of the scapulae are turned outward on an axis through the center of each scapula when viewed from the rear. As your arms go back past your body, both scapulae move in closer to one another and to the spine.
Variant 2: Pronated grip variant
In this variant the basic action is different from the neutral grip variant. It involves the posterior deltoid, the teres minor, and the infraspinatus in shoulder joint horizontal extension. In this action your arms travel in a horizontal plane (to the body) from a position in front of your body out to the sides and behind your trunk.
In the shoulder girdle the middle trapezius and rhomboid muscles are involved in scapula (shoulder girdle) adduction. In this action the scapulae move from an out-to-the-sides position on the rib cage to close to the spine. In essence, they slide in toward one another and the spine. The arm actions are basically the same as in the neutral grip variant.