Boyle won a bronze medal with
Helen Norfolk,
Alison Fitch and
Melissa Ingram in the 4 × 200 m freestyle relay at the
2006 Commonwealth Games. At the
2008 Olympic Games she was a member of the New Zealand 4 × 200 m freestyle relay team which was disqualified in the heats. She won a silver medal with
Penelope Marshall,
Amaka Gessler and
Natasha Hind in the 4 × 200 m freestyle relay at the
2010 Commonwealth Games. At the
2012 Olympics in London, Boyle was fourth fastest in the heats of the
400m freestyle in a
New Zealand record 4:03.63. In the final she finished 8th. In the 800m heats she swam 8:25.91, also a New Zealand record, qualifying fifth fastest for the final. In the final she swam another record of 8:22.72 to finish fourth, 2.40 seconds from the bronze medal which went to defending champion and world record holder
Rebecca Adlington. (yellow cap) at the
2015 World Aquatics Championships In August 2013, Boyle claimed three medals at the
FINA World Swimming Championships in Barcelona, becoming only the second New Zealander to achieve this feat (after
Danyon Loader in 1994). At the 2014 Commonwealth Games, Boyle won gold in the
400m freestyle and a silver medal in the
800m freestyle. She also finished fourth in the final of the
200m freestyle after breaking the New Zealand record in the heats. In the 400 m freestyle, she set a new Games record in the final. At the Wellington Winter Short Course meet in August 2014 Boyle broke the
World Short Course record in the
women's 1500m freestyle with a time of 15:22.68. At the 2016 Summer Olympics, Boyle was 14th fastest in the semi-finals of the 400 m freestyle, and did not make the final. In the 800 m freestyle, she was 0.29 of a second off making the final. Boyle is a graduate of the
University of California, Berkeley. She announced her retirement from competitive swimming on 1 August 2017 due to ongoing injury problems. In the
2020 New Year Honours, Boyle was appointed a
Member of the New Zealand Order of Merit, for services to swimming. ==See also==