I have actually become more of a morning person since becoming a mom. When I started my journey towards health I quickly realized I needed to figure out when I would get it in. There were no Stroller Strides classes near me so I needed to find the time without my daughter. That became early in the morning. Once she was sleeping through the night (at a young age, don't hate me) I started waking up early to get it in. That way the craziness of motherhood wouldn't get in the way. I know it isn't always easy, but our days still go so much better when I get up before my girls.
Take the time to listen to this podcast by Michael Hyatt. It has some great tips!