Allyson Felix sports discipline competed in 400 metres
Allyson Michelle Felix  (born November 18, 1985) is a retired American track and field athlete who competed in the 100 meters, 200 meters and 400 meters. She specialized in the 200 meters from 2003 to 2013, then gradually shifted to the 400 meters later in her career. At 200 meters, Felix is the 2012 Olympic champion, a three-time world champion (2005–2009), a two-time Olympic silver medalist (2004 and 2008), and the 2011 world bronze medalist. At 400 meters, she is the 2015 world champion, 2011 world silver medalist, 2016 Olympic silver medalist, 2017 world bronze medalist, and 2020 Olympic bronze medalist. Across the short distances, Felix is a ten-time U.S. national champion (2004, 2005, 2007–2012, 2015, and 2016).
Felix played a key role on the United States women's relay teams, winning six additional Olympic gold medals: four consecutive medals at 4 × 400 meters (2008, 2012, 2016, and 2020), and two at 4 × 100 meters (2012 and 2016). The women's 2012 and 2016 U.S. Olympic 4 × 100 meters teams set the women's 4 × 100 meters world record at 40.82 seconds, and the second fastest time in the event at 41.01 seconds, respectively. With these six golds from team relays and one from an individual event, Felix became the first female track and field athlete to ever win seven Olympic gold medals.  She is also the most decorated woman in Olympic track and field history and the most decorated American track and field athlete in Olympic history, having earned 11 total medals from five consecutive Olympic Games. Felix is the most decorated athlete, male or female, in World Athletics Championships history with 20 career medals, 7 from individual events and 13 from team relays.Among Felix's notable performances, her 200 meters personal best of 21.69 seconds, which was set at the 2012 U.S. Olympic trials, ranked at the time as the third-fastest time ever run by an American woman and sixth-fastest time by a female athlete in history. She also ran a 47.72-second leg on the U.S. women's 4 × 400 meters relay team at the 2015 Beijing World Championships, recording the fastest split ever by an American woman, and third-fastest split ever by a female athlete.Felix, along with Alysia Montaño and Kara Goucher, is credited with stirring public outcry over Nike's refusal to guarantee salary protections for its pregnant athletes, prompting the sportswear brand to expand its maternity policy in 2019. Two years after her departure from Nike, the athlete turned entrepreneur launched her own footwear company, Saysh, in June 2021.She was included in Time magazine's 100 Most Influential People of 2020 and 2021. In 2022, Felix received an honorary Doctor of Humane Letters degree from her alma mater USC and also served as the commencement speaker for that year's graduation ceremony.2010–11
In 2010, Felix focused on running more 400-meter races. Running the 200 meters and the 400 meters, she became the first person ever to win two IAAF Diamond League trophies in the same year. She continued her dominance by winning 21 out of 22 races, only losing to Veronica Campbell-Brown in New York. Felix also became the U.S. 100 meters champion by winning the sprint in 11.27 seconds against a strong −2.5 m/s headwind.At the 2011 World Championships in Athletics, Felix ran in the 200 and 400 meters, as well as the 4 × 100 and 4 × 400 meters relay races. In the 400-meter event, Felix's best efforts yielded only a second-place finish despite straining down the homestretch to a personal best of 49.59 seconds, 0.03 behind winner Amantle Montsho of Botswana. Montsho later tested positive for the banned stimulant methylhexaneamine in 2014. In the 200-meter final, Felix finished third in a subpar time of 22.42 seconds due to fatigue. Veronica Campbell-Brown won the gold and Carmelita Jeter won silver. In the relay events, Felix ran the second leg in both the 4 × 100 meters and 4 × 400 meters. Team USA won both events, attaining world-leading times in both finals as Felix added two world championship gold medals to her collection. The 25-year-old American sprinter was the only athlete to leave Daegu with four medals.2014–15
After a nine-month layoff due to a hamstring injury, Felix resumed competition in the 400 meters at the Shanghai Diamond League meet in May 2014, in which she finished fifth with a time of 50.81 seconds. She later competed in the 200 meters at the Prefontaine Classic meet, finishing third with a season's best of 22.44 seconds.
As the winner of the 2014 IAAF Diamond League 200-meter title, Felix received a bye into the 2015 World Championships in Athletics. Obligated to participate in the 2015 USA Outdoor Track and Field Championships but not required to run the 200 meters, she opted for the 400 meters.  Felix won the event in 50.19 seconds with a late surge from fourth place at the 300-meter mark, catching Natasha Hastings right before the finish line to earn her ninth U.S. championship title. World number one ranked Francena McCorory and number two Sanya Richards-Ross failed to qualify for the 2015 Beijing World Championships.
The 2015 Beijing World Championships schedule placed the 400-meter final just over an hour after the 200-meter semi-finals, making it virtually impossible to perform to world championship level in both events. As of July 1, Felix held the fastest seed time in both the 400 (0.11 over the fastest competitor) and 200 (0.22 over the fastest competitor), leaving her with a difficult choice as to which event to put her full effort into. Felix eventually chose the 400 meters and later triumphed in the event final with a personal best of 49.26 seconds. She dominated the race from beginning to end, making up the stagger from the start of the gun and never relinquishing her lead to claim the 400 meters title. In doing so, Felix became the first woman to win world titles in the 200 meters and the 400 meters. Additionally, she has now won the most world championship gold medals, and most overall world championship medals, out of any American track and field athlete. She continued to  add to her medal collection by earning silver medals in both the 4 × 100 meters relay and 4 × 400 meters relay. In the latter race, Felix received the baton with a significant deficit to the leading Jamaican team, prompting her to sprint a historic split time of 47.72 seconds to regain the lead for the American women before the final handoff. This was the fastest 4 × 400 meters split ever recorded by an American woman and third-fastest 4 × 400 meters split ever by any female athlete, after Jarmila Kratochvílová and Marita Koch. Running the final leg, Francena McCorory failed to hold onto the lead and was overtaken by Novlene Williams-Mills in the final meters.Still dealing with the physical repercussions from the accident, Felix raced the 200 meters and 400 meters anyway at the 2016 Olympic Trials in Eugene, Oregon, attempting to fulfill her goal of completing a 200–400 meters double victory at the 2016 Rio de Janeiro Olympics. In the 400 meters trials final, she surged from the middle of the pack down the homestretch and overtook the field in the final meters, recording a world-leading time of 49.68 seconds. Then, in the 200 meters final, the lack of speed work due to injury eventually caught up with her as she was narrowly edged out by Jenna Prandini, who dove across the finish line to secure the third and final spot on the team, beating Felix by 0.01 seconds (22.53 to 22.54 seconds). Felix took the rest of July and early part of August off to give her ankle more time to heal while she continued preparations for the Olympics.
At the 2016 Rio de Janeiro Olympics, Felix bumped her overall Olympic haul to nine overall medals: six golds and three silvers, tying Jamaican legend Merlene Ottey's record for the most Olympic medals won by a female track and field athlete, although most of Ottey's medal collection consists of individual medals. Felix's hope of winning the 400 meters Olympic gold medal came up short after she lost by 0.07 to Shaunae Miller of the Bahamas, who made a legal but controversial dive across the finish line as Felix was quickly closing the distance. Felix recovered from the disappointing performance to win two golds with the U.S. 4 × 100 meters and 4 × 400 meters relay teams. The 4 × 100 meters relay win drew much controversy, as Team USA was initially disqualified in their semi-final run after Felix had dropped the baton during the handoff attempt to English Gardner. However, replays showed that the Brazilian sprinter in the neighboring lane swung her arm and accidentally impeded Felix right before the handoff, causing her to lose her balance. After the appeal was accepted, Team USA was awarded a solo run the next day. With a successful time trial, Felix and her teammates advanced to the final, where they won in 41.01 seconds, the second-fastest 4 × 100 meters relay time in history.The following year, during the 2017 World Championships in London, Felix added three more medals to her collection, cementing her position as the most decorated athlete in IAAF World Championships history. Felix equaled Merlene Ottey's and Usain Bolt's 14 medal tally by winning a bronze medal in the 400-meter final with a time of 50.08 seconds. She admitted that the result was disappointing, as she was hoping to defend her title in the discipline. Just a month prior to the championships, Felix had won the London's Diamond League meet held at the same track with a world-leading time of 49.65 seconds. Felix earned two additional gold medals by partaking in the 4 × 100 relay and also the 4 × 400 meters relay, in which she ran a 48.7-second leg, bringing her tally up to 16 world championship medals.Personal bests
At the 2012 Summer Olympics Felix ran the second leg of the 4 × 400 meters relay in a time of 48.2 seconds.
At the 2015 World Championships Felix ran the third leg of the 4 × 400 meters relay in a time of 47.72 seconds, which is the fastest 4 × 400 meters split ever by an American woman and third-fastest 4 × 400 meters split ever by any female athlete, after Jarmila Kratochvílová and Marita Koch.
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