Kung Fu is not just a workout, it's a practice. It's good to have goals but the goal of Kung Fu is more in the doing and not as much in the receiving. We practice for the sake of practicing, which allows us to be present and receive joy and proficiency while we're doing it. Many fitness routines don't always require a mindful presence, that's why you can watch TV on a treadmill. 

Kung Fu's reward is in doing Kung Fu, so we are all masters while we're practicing. It requires you to be present and aware, to correctly see everything going on while you're doing it. This not only develops the mind-body connection, it developed our ability to pay attention, to ourselves, to our body and the world around us. If we get distracted or lost in thought we make mistakes. This is as true in life as it is in Kung Fu Practice. Life is made of moments, Kung Fu trains our brain to pay attention to those moments otherwise we miss out on life.

One of the most difficult parts of Kung Fu training is that 50% of it is training the mind. Most people who come to a gym to workout don't want to be there. That's why there are TV's in front of treadmills. Training the mind to be present and aware can be rigorous but the benefit is that you fully experience life! 
Kung Fu is a lifestyle. Take what you learn in class into your life and live every moment.