Why workout? Why eat healthy? I am not talking obsession with looks here, I am talking about a genuine desire to take care of your body to the best of your ability. For me, it doesn't work to say "Ok, I am going to start to workout tomorrow". News flash, I never do!!
What does work for me is that God blessed me with a body, and I better take care of it! Here is a great blog post on the resurgence about taking care of our body from a biblical perspective (it's short and worth the read!): The Resurgence
picture from someecards.com