The singer, who was known by her alter ego Sporty Spice in the band, put her endurance to the test for the Virgin Active London Triathlon as she battled through the running, swimming and cycling event to raise funds for Shelter, which helps to support and rehouse homeless families.
Chisholm later took to her Twitter.com page to post snaps of herself in a wetsuit and reaching the finish line, writing "Loved (The London Triathlon) today... I beat my (personal best). Such a great sport, get involved... I love being sporty!"
Keen to keep up her fitness levels, the star will soon be undertaking half marathon the Bupa Great North Run in September (13) and has already started training, adding, "Post triathlon blues. New focus is (the Bupa Great North Run) where's (sic) my trainers?"