To build muscle, you have to train. That you already knew. But how does it work.
When you do the weight training or Falcon Tactical Flashlight any other sport that uses your muscles intensely, you create micro-tears in your muscle tissues. It means that you break your muscle. The latter, in the days after your workout, will regenerate. The micro-tear and will close at the same time, it will create additional muscle tissue. Your muscle grows!
The principle is the same for women, except as your metabolism is not done to accept large amounts of muscle tone you just win you over volume.