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 best thing about these exercises is that you only need some dumbbells, a barbell and your own body weight. One Arm Dumbbell Rows. This is a fantastic exercise for building overall thickness in your back and targets the latissimus dorsi, rhomboids, lower traps, and the erector spinae.This is one of those great âbang for your buckâ exercises that you can always rely on for packing on muscle mass to your upper body. Bent Over Barbell Rows.After the deadlift exercise, this is the âgo toâ mass builder for your back. Make sure to use proper form on this movement since form and technique is of the utmost importance.tâs much better to use a lighter weight in order to place all of the emphasis on the muscle group being targeted and to ensure your overall safety. Pull-Ups. Yes, I did include a bodyweight exercise into the mix of the best mass builders for your back.