"My profession expects me to practice what I preach and set an example. This means paying special attention to the mind and the body, which is an attitude that will see me practicing medicine part of the day, and physical fitness another part--of each day. I feel you cannot have one drive without the other."

This is a question for which the answer will allow the interviewer to get to know you better--not you as the DO, but as the person. So stay away from spare time activities that are exclusively health-oriented. Hobbies, passions, and recreational pursuits are what you want to mention, not that you read your journals (although reporting that you do volunteer work related to your vocation is not only allowable, but recommended).

"In my spare time, I like to read the classics. In school, I had very little time to read anything non-medical. Now I purposely orchestrate my time to allow for the important books everyone should read."