Does meditation help with fitness/bodybuilding?

I am currently working on including more mindfulness in my own program and with all clients. Which includes meditating and other mental programming. I have used variations on these themes with athletes to help improve focus, awareness, preparation, etc. In the past I included these types of things when the athlete was having difficulty overcoming things on the mental side. Now I am starting to include this type of programming in every clients approach to wellness. The more I learn about the mental side of health, the more I realize that it is every bit as important as the physical side. And both the physical and the mental sides are aided by each other.