South Australian born and raised, Henry Frayne started to emerge as a very talented triple jumper in his early teens. In 2007, as a 16-year-old, he followed his coach, Vasily Grishchenkov, and moved to Melbourne. On three occasions in 2008 and 2009, he raised the national junior triple jump record by placing fifth at the 2008 IAAF World Junior Championships and making the final at the Summer Universiade.
In 2010, he was again on the move, on this occasion to Brisbane under coach Gary Bourne. In 2011, there was a significant progression in his jumping, placing ninth at the IAAF World Championships, with seven jumps over 16.75m and his first 17-metre triple jump in the same season. His long jump remained solid with a best of 7.98m. He enjoyed a stunning 2012 season. In the long jump, he raised his PB from 7.99m to 8.27m in just one competition. It earned him selection for the IAAF World Indoor Championships in March, where he won silver, and to the London Olympics, where he placed ninth. The triple was just as impressive, improving from 17.04m to 17.23m and earned selection for the London Olympics. He became just the third Australian and first since Phil May in 1968 to compete in the long and triple jump at the Olympics.
Some injuries over the next couple of years restricted his competition to the long jump. After competing at the Continental Cup and Commonwealth Games in 2014, he qualified for his second Olympics in 2016 where he placed seventh. Injury restricted his 2017 summer campaign, but with his second competition in Europe, he achieved the qualifier for the world championships, jumping 8.21m, his equal third best distance ever. At the 2017 World Championships, he leapt 7.88m in the qualifying rounds, missing a place in the final by just 3cm.
It was a bit of a stop-start 2018 summer campaign for Henry. In good form, he had to abandon his planned season opener at the Queensland Championships with an injury in the leadup. He started his season two weeks later at the Australian Championships and Commonwealth Games trials in the qualifying rounds of the long jump with just one leap of 7.67m. However, another niggle forced him to withdraw from the final. As the only athlete on a Commonwealth Games A qualifier, a week later was named on the Australian team for the Gold Coast Games.
At the Games, Henry jumped a new personal best in the qualifying round of 8.34m. The final was a great battle with South Africa's Luvo Manyonga who won gold with 8.41m just 8cm in front of his Australian friend and rival.
Henry’s uncle, Bruce Frayne, competed in the 400m at the Los Angeles Olympics in 1984. His father Geoff was a multiple place-getter at Australian Championships in the long jump.