When it comes to building muscle, one question that often arises is whether or not you need carbs in your diet. Carbohydrates have long been touted as the primary fuel source for the body, but can a low-carb diet still allow for muscle growth? Let’s take a closer look. Importance of Carbs in Building Muscle Carbohydrates play a critical role in providing energy for intense workouts, and they are also essential for the recovery and growth of muscle tissue.