Great excitement at the Thomas A. Robinson Stadium in Nassau, Bahamas, during the second edition of the IAAF World Relays. One of the most exciting races was the women's medley relay, who made his debut in the event posting the new world record: the American team (Treniere Moser, Sanya Richards-Ross, Ajee 'Wilson, Shannon Rowbury) won with the time of 10: 36.50.
There was also great show in the final of the men's 4x100m. The title was won by the USA team, who with a time of 37.38 set the championship record. The American quartet composed of Mike Rodgers, Justin Gatlin, Tyson Gay and Ryan Bailey preceded the one led by Jamaican Usain Bolt (37.68, personal best seasonal) and Japanese (38.20, personal best seasonal). In the other races stand out success by the Jamaica in men's 4x200m (1: 20.97), the US in the men's 4x400 m (2: 58.43, world record seasonal) and the men's4x800 meters (7: 04.84, championship record). Among women, great performance of Jamaica in the 4x100 m (42.14, world record seasonal), and Nigeria in the 4x200m (1: 30.52, world record seasonal). Following the event, the United States has seen place themselves on the top step of the medals podium, with 7 gold medals and one silver.
The competitions were held at the Thomas A. Robinson National Stadium, in the Queen Elizabeth Sports Center in Nassau, the Bahamas. Athletes ran track Mondo Super X 720, which provides a significant increase in comfort without compromising athletic performance through the application of technology exclusively developed for Mondotrack.