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
Sometimes it is advisable to change the number of workouts you have per week to prevent adaptations from occurring. If you usually perform 4 workouts per week and you have hit a plateau, try doing 3 workouts per week for 1-3 weeks.