Yes I choose to live by a certain set of values, and they are Christian values. However, I'm not controlled by my values anymore than you are controlled by your values. Sure mine are written in a book and yours may not be, but we both still choose to adhere to certain values or disregard them.
My argument for riding for Christ wasn't that God permits us to ski. It was instead that skiing for Christ is one small part of living for Christ. As Christians, we are called to live for Christ, to make him the focus of our lives. That doesn't mean we sit in church all the time, instead we worship God throughout the day, everyday.
Just to clarify for people, worship does not mean bowing, praying or singing. They are only a small part of it. Worshipping God means living our lives according to how he wants us to live them. How we approach our jobs, how we deal with people, and how we conduct ourselves on the ski hill. That is living for Christ, and when skiing, that is riding for Christ.
I don't know if the explanation is clear or not, hopefully you understand a little better what riding for Christ means.