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.
Gym Machines & Equipment. Most gyms have machines or equipment that will target the abdominals specifically. The seated abdominal crunch and captain's chair are two such machines that tone the rectus abdominis and lower abs respectively. Ask a fitness trainer to show you how to properly use machines to avoid improper technique and injury risk.