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
The American College of Sports Medicine, or ACSM, suggests beginners lift weights up to three times per week with at least one full day of rest between workouts. This general recommendation is adequate for the average weightlifter who does a 30 to 45 minute full-body weightlifting workout three times per week.