The Havelock North resident will once again tackle the 21km Half Marathon, representing her employer, New Zealand Sotheby's International Realty, one of the event's sponsors.
Was it a midlife crisis that caused Sophie to take a good, hard look at herself?
"If it was, it's not a bad crisis," she says. "I don't know what I'd call it. It's more about wanting to get to feeling how I was when I was younger. It's a chance to do something for me, and that's a benefit."
While never a couch potato - raising three sons tends to keep you busy - Sophie found her new exercise regime to have added benefits.
"It helps mentally and with your whole attitude," she says. "It helps you cope with all the stuff that's on every day - between children and work.
"With real estate, fitness helps you with the stress level."
Now that she is fighting the good fight against a metabolism that naturally slows down after you turn 40, Sophie says she is "feeling fit. I'm feeling stronger".
Is she looking forward to tackling her second half marathon?
"It will be good. And it will be good when it's done."
For more information: hawkesbaymarathon.co.nz