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.
Limited strength in the forearms can result in fatigue when lifting weights or while completing many task required by hands, like cooking, yard work and holding power tools. Dumbbell hammer curls will help strengthen your forearms so you can complete everyday task without arms being painfully worn out. Keep the elbows locked and close to your body. 2  Through the whole hammer curl, keep your elbows locked in at your sides. 3  If you find that when you are doing the hammer curl that your elbows are moving forward, lower your weight.