Protein shakes are not designed exclusively for bodybuilders. Athletes engaged in running and endurance training can improve their results with the help of protein. By taking protein before endurance training, we enhance the body's metabolism, meaning it won't break down muscle proteins after using up other sources of energy. Furthermore, post-workout protein intake promotes muscle development and growth.
For endurance training, the best options are multi-component proteins and gainers that contain carbohydrates. Carbohydrates provide the body with additional energy needed for endurance training. Gainiers can also serve as a meal replacement.