Mary Spencer of Wiarton, Ont., is a three-time world champion fighting out of the Windsor Boxing Club as women's boxing makes its Olympic debut. (MARK BLINCH/REUTERS)
Tara Whitten of Edmonton is a two-time world champion in omnium cycling. (Andrew Brownbill/AP)
Paula Findlay of Edmonton dominated women's triathlon in 2011, and was the top-ranked female triathlete in the world. (Kevin Van Paassen/The Globe and Mail)
Adam van Koeverden of Oakville, Ont., has two Olympic medals and won the 1,000-metre kayak world championship in 2011. (LASZLO BALOGH/REUTERS)