How does a naturally thin person gain muscle in a short amount of time?

By admin|how to gain muscle

Since summer is here, I am really hoping to gain muscle and weight the right way. As a guy, I really want to just impress the ladies at the beach. I have a month or so to get myself into good shape. Any advice on some exercises i should try and a good diet?

below is an article with pictures of a 15yr. old who worked out once a week and gained 11lbs. in a month. since he has a nice six pack i would say he gained almost all muscle.
he just ate more calories to gain weight. about 1200extra calories a day. if he ate 3meals a day then he ate about 400 extra calories per meal for a month.