i guess you would say i'm an ecto because i'm 6'2 and only about 136 pounds. i want to gain at least 10 pounds. i used berardi's massive eating calculator and it's telling me i need 3800 calories per day just to maintain my weight (i run 4-7 miles 6 days a week). that can't be right because i've only been eating 2500 and i don't gain or lose. now i know you're supposed to go 250-500 calories over maintenance to gain muscle, so if i ate 3800+ wouldn't i gain tons of fat? or is it possible that i just have a really slow metabolism? i'm just really confused. basically, i just want to know the best way to gain 10 pounds with most of it being muscle. i do lift 5 days per week. what do you think i should do?