Brass and bronze, an alloy made from copper and tin, have been made for thousands of years, although brass was often made by accident. Early intentional brass was actually made with calamine, a mineral which contains zinc.
As I mentioned, you should strive to lift weights 3 times a week, but if you can only make it twice, you will still get most of the benefits. 4 1. Full-Body Workouts
Although there's really no set recommendation for how many times you should exercise each day to lose weight, there are recommendations for how many minutes you should work out per week. Aim for a range of 150 to 300 minutes per week, suggests the Centers for Disease Control and Prevention.