Teacher needs help!

Hey fellow teachers, I have been on summer vacation and have completely fell off the wagon. We start school this Thursday and I am ready to get back on track tomorrow. We have to go to PD meetings for the next 2 days but I thought this is no reason why I can't work out. Before we got out for the summer I would walk the building for 30 minutes while my kids were at lunch and recess. I just ate my lunch on my break. Then i would go home and do another 30 or 40 minute work out. i lost 20 pounds and was so happy. I'm ready to get back on track. Any teachers willing to start a teach and loose challenge until Thanksgiving break. I'm not sure how many weeks that is but i need some motivation and would love to start with my fellow teachers out there!