The British singer, nicknamed 'Sporty Spice' during her 1990s heyday, is backing the Human Race Women Only campaign, which aims to encourage more ladies to shape up.
Organisers have arranged a series of events across the U.K. throughout 2013, including swimming, running and cycling, and Chisholm is marking International Women's Day on Friday (08Mar13) by promoting the drive.
She says, "The Human Race Women Only series is a fantastic celebration of women in sport. It allows ladies to compete in an environment which is encouraging and fun. Women contribute so much to the world of sport and these events offer a chance for all women to get involved regardless of their age or ability."