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
Ultimately, then, it's not a case of weight training or aerobics. It's both. So don't believe the hype. Instead, follow the guidelines recommended by the American College of Sports Medicine. They'll help lead you to good health, not to mention a healthy weight! 1  Exercise 3 to 5 days each week.