Before I had my daughter, I loved to run. I ran cross country all through middle school and played soccer where I constantly ran for about seven years. Even through college, I continued to run in my spare time. So, when I found out I was pregnant, I knew pregnancy (and motherhood) wasn't going to stop me from continuing my favorite pastime. As long as it was physically safe, I'd continue hitting the pavement. After all, there are many reasons to continue running, but easily the best reason is the fact that running becomes even better after you have kids.
When I ran with my daughter for the first time, I realized that running wasn't, and never would be, the same. Instead of being a simple source of exercise, it was something I could now share with my kid, too. After she learned to walk, she quickly learned how to run and now we can run together, on a track or in the yard, and when I look at her I see a giant smile on her face. That smile lights up my world. Likewise, running is still something I can do for myself, and only myself. I get to continue something that makes me feel like "me," and when you become a mother, maintaining your individuality is crucial.
While there are plenty of people who find new things to love once they have kids (I mean, priorities do change), I personally think that not only remembering the things that gave you joy prior to becoming a mom, and maintaining their existence in your every day life as a mom, is important. That's definitely why, for me, running is better now that I'm a mother. I feel like myself, and I get to share something with my daughter. Well, and I have the following things to look forward to, also.