Since late 2010, Jack Green has trained with
Malcolm Arnold at the
University of Bath alongside fellow hurdler
Dai Greene. He also won a gold medal at the
2011 European U23 Championships in the 400m hurdles. Following his experience at the previous year's World Championships, Green skipped the European Championships in 2012 to concentrate on the Olympics. In May 2012, he won both the 400m and the 400m hurdles at the
BUCS Championships which were held at the
Olympic Stadium in London. Green placed second in the 400m hurdles at the British Olympic Trials, behind his training partner and World Champion, Dai Greene. At the start of July 2012, Green was named to the athletics squad for the
2012 Summer Olympics, to compete in the 400 metres hurdles and 4x400 relay. Two weeks prior to the games, he ran at
a meet at
Crystal Palace National Sports Centre, setting a new personal best in both the 400m and the 400m hurdles, at 45.99 seconds and 48.60 seconds. In the 2012 Olympics, Jack Green was eliminated in the semi-finals of the
400 m hurdles, hitting a hurdle and falling. He performed well in the
4 × 400 metres relay, running 44.42s, as Great Britain finished fourth, just 0.13 seconds outside of a medal. Having suffered from depression throughout 2012, Green announced in 2013 that, despite a full recovery, he was taking a break from the sport to allow his health to improve further, and leaving the
British Athletics high-performance funding programme to do so. In August 2014, Green announced his intention to return to the track for the 2015 season and returned to full-time training in Florida. He had to miss the
2015 World Championships due to sciatica, but raced at the
2017 World Championships, where as well as the 400 m hurdles, he ran in the heat of the 4 x 400 m relay. In 2018, he finished 4th at the
Commonwealth Games. Since then has worked as head of wellbeing at
BBC Studios and founded his own wellbeing consultancy, Olywel; in April 2021 he became head of performance of the workplace wellbeing platform Champion Health. ==Personal life==