[Reincarnate]

Originally Posted by popsicle_3000

who says this?

"hardgainers"

Skinny people who tend to attribute their inability to gain much weight or muscle on genetics / metabolism / etc.

More often than not, they're just not eating enough due to their typically smaller appetites, as Reach said earlier.

Lifting weights in itself doesn't grow your muscles. It tears* them / signals them to ramp up synthesis. Then your body uses the food you eat to repair and grow them. To get bigger, you need mass. To get mass, this requires energy. To get energy, you need food.

*I'm oversimplifying because there are other drivers at play here but I'm choosing one that's easy to understand