The most important thing you can do to inspire a girl is to make everything a team effort. A girl is more likely to be active if her parent, guardian or other key adult in her life is active. Let her see you working out, sweating and making physical activity part of your life. Be a real-life hero as she sees you jogging that extra lap, attempting that 3-point shot, striking that yoga pose. There are a number of ways you can emphasize that you are in this together.