Core...

What are you doing to strengthen your core? When I first started working on my core I remember struggling with planks.  My lower back was very weak.  I've had three c-sections and ever since I've struggled with back pain. Now I've gotten more weight off and I really enjoy planks.  I'm also a big fan of moutian climbers now.  It's amazing how losing weight can change your life in so many ways. Here's an article of some really fun core exercises.  Enjoy!

http://www.stack.com/2014/04/30/best-core-exercises/