In 1944 alone, the United States built more planes than the Japanese did from 1939 to 1945. By the end of the war, more than half of all industrial production in the world would take place in the United States. Wartime production boomed as citizens flocked to meet the demand for labor.
Exercise machines are an easy and effective way to build the gluteus maximus or butt muscles. Many weight and cardio machines have been designed specifically for this purpose. However, like all muscles, it takes time to build the butt muscles and see results.
Chi Machines. As with whole body vibration, these machines shake the body from the ankles up. The big difference is that the moving and shaking goes on while you're lying down. How It Works: You lie on the floor (or a treatment table) and place your ankles on top of a small square box that basically vibrates your body from the feet up.