Weight Training Goals (Part 3 - Why Protein?)

My personal trainer is insistent on making me consume protein by any means possible. Chicken breast, Muscle Milk, even a protein bar post workout would be acceptable to him. Why is this so important?

Without protein you simply cannot build muscle. Carbohydrates are great for energy, the kind of energy to get you through that grueling gut busting workout. But it doesn't matter how much carbs you eat, without protein your body won't have the amino acids to build and repair your muscles.

It's recommended that to build muscle you have at least 1g of protein for every lb of body weight.