Anonymous wrote:He doesn't need to "optimize his diet"; he just needs to eat! An extra peanut butter sandwich and glass of whole milk per day will help him grow.
I have had my Concept 2 for over 30 years. I suggest trying interval workouts to get faster.
My rower dorm mate used to stack up 6 peanut butter sandwiches in the dining hall at night and carry them out for second dinner later. The dining hall technically didn’t permit it but the staff was so nice and they felt sorry for him because he was skinny and hungry. By senior year in college he was huge, but for some guys the skinniness lasts for years.
Food, any food, is more important than protein. If he’s growing and working out at the same time, the amount of calories he needs is going to be stunning.