OTTAWA -- Just over two years after losing both legs in the Westboro bus crash, Marcie Stevens is set to take the next steps in her recovery process by participating in Tamarack Ottawa Race Weekend. The Ottawa woman will attempt to walk two kilometres on her prosthetic legs Sunday morning, raising money for the Ottawa Hospital's Emergency Department and Rehabilitation Centre. In an interview on Newstalk 580 CFRA this week, Stevens described walking with her prosthetic legs as, "walking on stilts." "You're basically walking straight leg, so you're waddling like a penguin. It's trying, as a bilateral amputee above the knees when you walk with prosthetic legs you are using 300 per cent more oxygen," said Stevens. "So it's basically like running a marathon just walking."