Canada at the Summer Olympics became the first Canadian Summer Olympian to win a medal in four straight Olympics. After George Hodgson won two gold medals in the 1912 Stockholm games, it would be 72 years before Alex Baumann became the second Canadian swimmer to win Olympic gold, when he won both individual medley events in world record time in the 1984 Los Angeles games. Victor Davis (1984), Anne Ottenbrite (1984), Mark Tewksbury (1992) and Penny Oleksiak (2016) are the only other Canadian swimmers to win gold medals. In 2004, Canada failed to win a medal of any colour in swimming for the first time
United States at the 2008 Summer Olympics swimmer. Dara Torres, who won 3 silver medals after her eight-year absence, became the oldest Olympic swimmer to win a medal, at age 41. Gymnast Nastia Liukin became the third U.S. female to win a gold medal in individual all-around event. It was also a successful Olympics for U.S. team-based sports, as men's and women's basketball teams both won gold, as did men's volleyball, men and women's beach volleyball, women's soccer, women's eight in rowing, and the men's and women's 4 × 400 meter-relay teams. The US won silver and bronze medals in several other team events; women's volleyball, softball,