[LaidbacK]

I used to be in the same situation as yourself, skinny, high metabolism and very tough to gain weight.

First off, stop doing cardio. It costs 3500 calories to gain a pound. Eat, eat and eat. Try to eat 5 meals a day rather than 3 big meals. Instead of drinking water, drink milk or juice for those extra calories. Don't forget to hit up the gym or else you'll just get fat lol.

I went from 5"7 @ 135 pounds to 150 pounds through eating a lot, working out, and weight gainer protein.

FUN FACT: Sumo wrestlers eat a HUGE meal and after the feast, they take a nap because when energy is not used, it will be stored as fat for later use!