Originally Posted by MrSmall
Don't change anything, just eat 100g protein and 100g carbs (sources of your choice) a day, and check your weight only after 2 weeks of steadily doing this, nothing will change much sooner than that.
From there ask again. If you aren't putting on weight, probably change your training a little bit, lessen the longer distance running if you are doing it and replace with some intervals, that sort of thing.
100g protein and 100g carbs? are you serious?