Welcome to Spark and thanks for the birthday wishes!!!! I hope you find this site as helpful as I do! There is SO much good information! Let me know if you have any questions! Are you planning on running a marathon? I ran my first one last August and it was one of the best days of my life! This year, my goal is to run 5 half marathons in 5 months! :) Another great site I am on is dailymile.com to track your running and walking miles - great job on the 17 pounds lost!!!!!