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
When training to significantly strengthen your muscles, you should only be lifting weights three to four days per week, focusing on a different muscle group during every workout. Your aerobic exercise should be minimal, not much more than a comfortable walk for 20 to 30 minutes, one to three days per week. Certainly, you can walk on the treadmill at the gym or around your neighborhood. Ultimately, you only need to go to the gym three to four days per week to develop maximum strength.