Jessica Ennis-Hill of Great Britain competes in the Women's Heptathlon Javelin Throw on Day 8 of the Rio 2016 Olympic Games at the Olympic Stadium on August 13, 2016 in Rio de Janeiro, Brazil.
Jessica Ennis-Hill of Great Britain, Antoinette Nana Djimou Ida of France, Katerina Cachova of the Czech Republic and Nadine Visser of the Netherlands compete in the Women's Heptathlon 100 Meter Hurdles on Day 7 of the Rio 2016 Olympic Games at the Olympic Stadium on August 12, 2016 in Rio de Janeiro, Brazil.
Jessica Ennis-Hill of Great Britain reacts in the Women's Heptathlon Javelin Throw on Day 8 of the Rio 2016 Olympic Games at the Olympic Stadium on August 13, 2016 in Rio de Janeiro, Brazil.
London 2012 - after losing her heptathlon world title to Russia's Tatyana Chernova last year, British heptathlete Jessica Ennis remodelled her javelin technique and reset her personal best on the way to winning Olympic gold.