Honestly, good for you. I am almost two years into my spreadsheet and I try to get in 10 minutes a day of intense exercise and half an hour or more of walking to counter sitting all day at the computer. Many people try to "get healthy" and change their entire daily routine at once and that is impossible to do while also living a normal life. It sounds like you layered in one activity at a time and each success motivated the next ambitious goal. This is a smart strategy and one I would recommend to others.