Adrien Hardy began in 1999 for the first time at World Rowing Championships and finished third in the one the 21th Place. In 2000 he moved into the double sculls and qualified together with Frédéric Kowal for the Olympic Games in Sydney. There Kowal and Hardy missed the finals and occupied as the winner of the B-final in seventh place. In 2001, Sébastien Vielledent for Kowal into the boat, Hardy and Vielledent occupied at the World Championships in Lucerne second place behind Hungary Akos Haller and Tibor Peto. In 2002, the two Frenchmen only the B-final and placed on the seventh rank. 2003 won Hardy and Vielledent her first World Cup race in Milan. On the same route and the World Rowing Championships were held in 2003, in which the two French won against the Italians Rossano Galtarossa and Alessio Sartori. In the 2004 season, the World Cup Results were quite different, to a tenth place in Poznan, followed by a third place in Munich and a fourth place in Lucerne. At the Olympic Games in 2004, the French were victorious against the Slovenian title defenders Luka Spik and Iztok Čop, Galtarossa / Sartori received the bronze medal.
2005 Hardy went to the quadruple sculls at the world championships, finishing fifth. 2006 were Jean -Baptiste Macquet and Adrien Hardy a new double sculls who won the World Cup in Poznan and Lucerne and Munich was off third. The World Rowing Championships in 2006 in Eton Macquet and Hardy won before Spik / Čop. Occupied in 2007, the two Frenchmen in the World Cup places four, five and six, at the World Championships in Munich, she won silver behind the two Slovenians. 2008 World Cup results were similar to those in the previous year, occupied at the Olympic Games 2008 in Beijing Macquet and Hardy fifth place. 2009 Adrien Hardy appeared again in the quadruple sculls at the World Rowing Championships 2009, the French boat reached the fifth place.