Constantine learned to row at Eton and in 2009 he stroked the Eton VIII that won at
Henley Royal Regatta, the
National Schools' Regatta and the Schools' Head. He was in the six seat of the winning Oxford Blue boat at the 2011
Oxford-Cambridge Boat Race. Later in 2011, he won the Men's Pairs, with
George Nash, at the FISA World Rowing Under 23 Championships on the Bosbaan on 24 July 2011 in
Amsterdam, Netherlands. He took a year out of his studies to train for and compete at the
2012 Summer Olympics, winning a bronze medal in the
men's eight. Louloudis then returned to his Oxford studies, rowing in the winning eights of a second and third
Boat Race in 2013 and 2014, before returning to the British eight, which he stroked to a gold medal at the
2014 World Rowing Championships. The next year he won a final Boat Race as president of Oxford University Boat Club. He was part of the British team that topped the medal table at the
2015 World Rowing Championships at
Lac d'Aiguebelette in France, where he won a gold medal as part of the eight with
Matt Gotrel,
Pete Reed,
Paul Bennett,
Moe Sbihi,
Alex Gregory,
George Nash,
Will Satch and
Phelan Hill. At the
2016 Olympic games in Rio de Janeiro, Louloudis rounded off his medal collection by stroking the GB men's 4- to gold, the fifth consecutive time a British crew had won the event. ==Post rowing==