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
Unlike what you may read about in the muscle mags, you do not have to train hours a day, seven days a week to get results. In fact, any more weight/resistance training than 2 to 3 hours a week may be counter-productive. The best results I've witnessed while in the personal training field come from 3-5 sessions a week with weights, less than an hour each session.