Jack Green (athlete) Jack Green (athlete) Jack Green (born 6 October 1991) is a British sprint athlete who specialises in the 400m distance, along with the hurdles and the 4 × 400 m relay. He competed for the Great Britain team at the 2012 Summer Olympics in London and at the 2016 Summer Olympics in Rio de Janeiro. Since late 2010, Jack Green has trained with Malcolm Arnold at the University of Bath alongside fellow hurdler Dai Greene. At the 2011 World Championships, he finished fifth in his semi-final, a performance he described as "embarrassing, a waste of my time and the team's
Dai Koyamada that compares is Daniel Woods. Dai Koyamada Dai Koyamada (, born 23 August 1976) is a Japanese rock climber and known as one of the premier boulderers of his generation. He has also put up or repeated hard sport climbs. Dai was born on 23 August 1976 in Kagoshima and has been climbing since 1993. Despite his shorter stature at 165 cm and 58 kg Dai has excelled at a wide style of rock climbing at the highest level of difficulty. In 1996, Koyamada won the Japanese National Championship. This is the event which allowed him to become a professional