Historical Examples. 1  The lower part of C bulkhead was doubled and was in the form of a cofferdam. 2  The whole was built in a cofferdam, quite dry, and the opening was a holiday. 3  And the night shift began to repair the cofferdam for old Jezebel had dropped suddenly back into her old trail.
A man is does a dumbbell pullover at the gym. Photo Credit Click_and_Photo/iStock/Getty Images. Dumbbell pullovers are a bit of an exercise anomaly in that they work two opposing muscles simultaneously: the chest and the back muscles.The chest muscles are the primary movers, but several muscles of the back assist during the movement.econdary Movers. The latissimus dorsi, which is a large back muscle that fans out from your upper arm bone to your spine and then extends down to your hip bone, assists during the pullover exercise. Several other muscles, including the rhomboids, rear delts and triceps, are also involved as secondary movers.
The rhomboid, scapulae and trapezius muscles in the back, pull the shoulder blades back, up, down and inward. These muscles are essential to strong pulling and holding of the bow string. A rowing exercise works all these muscles. A rowing machine is a good way to exercise these muscles. Use dumbbells or resistance bands to perform a forward rowing exercise.