You build it through continued, repetitive use.
By exercising your body and by eating proteins.
muscle gain
When you do your work out , you do not gain weight , your body uses it to build muscles.
mass xxx to gain weight and build muscle
Muscle and fat are two different things, simple if eat and do nothing you gain fat not muscle, if the muscle becomes inactive you will lose muscle. Muscle growth comes when the muscle get stimulated or understress they grow in order to compensate for the stress they are under. but the body needs the proper diet to make the muscle to grow as well. http://cal muscle building tips is a good source.
Lifting weights will make your muscles contrast and burn fat from your body while strengthening the muscles at the same time. It will help you gain muscle.
what muscles of a weight lifter/marathon/runner/compared
Generally you will gain about 2 pounds of muscle a month when body building when you are a strict beginner and working really hard at eating proper. If you are gaining much more then that I would be concerned that it isn't all muscle gain.
Unlike muscle, you can't gain fat on just one part of your body. If you gain, you gain all over. And the method is through increased calorie consumption; but do it moderately.
By training your whole body and not worrying about your gunz. I would say you should just work on your upper body. :)
No its not or else you will die if you gain weight your heart needs to get bigger Wichita is not good for your body
Yes, you can gain Muscle from working out while on weight loss supplements. There is also something called "creotine" that increases water mass in the body that can eventually be turned to muscle.