Polk began in 2002 with the rowing and participated in the 2004 at the Junior World Championships, where she finished in seventh place with the American eighth. In 2008 she won the eight at the U23 World Regatta. The World Rowing Championships in Poznan 2009 she attended along with Jamie Redman, Elle Logan and Esther Lofgren in four without coxswain second place behind the boat from the Netherlands. 2010 changed the rowers in the eighth and won the title at the World Championships in New Zealand in the cast Anna Goodale, Amanda Polk, Jamie Redman, Taylor pinion, Esther Lofgren, Elle Logan, Meghan Musnicki, Katherine Glessner and coxswain Mary Whipple.
In 2011, Amanda Polk, along with Erin Cafaro tried in the first World Cup regatta in Munich Oberschleissheim two without coxswain and took fourth place. At the World Cup finals in Lucerne were both sitting in the stern, who also won this regatta. After redeployment of U.S. eighth defended the title at the World Championships in Bled, in the winning boat sat Esther Lofgren, Zsuzsanna Francia, Meghan Musnicki, Taylor pinion, Jamie Redman, Amanda Polk, Caroline Lind, Elle Logan and Mary Whipple.
The World Rowing Championships 2013 in Chungju, she won the gold medal in the eights.