Changing seasons, changing styles

It may be over 100 degrees outside, but fall is just around the corner (I hope!). Changing seasons isn't always about the weather. It can also be about taking on new adventures in your own life. I know I've slacked off over the summer with my fitness routine, so my challenge is to train for a half-marathon to support breast cancer research. My aunt recently underwent a double mastectomy for a very aggressive form of breast cancer, and my close friend's mom was just diagnosed as well. My change will be introducing fitness back into my life. What will your change be?