Michael Phelps shared his personal struggle with anxiety, depression and suicidal thoughts at a mental health conference. The Olympic swimmer said his first major depression was in 2004, which was around the time he was charged with his first DUI.

• Athlete, Swimmer
  (1985–)

Caitlyn Jenner, formerly known as Bruce, was one of the most beloved athletes of the 1970s and a gold medal-winning track star who set a world record in the decathlon at the 1976 Summer Olympics. As Bruce, he also appeared on the popular reality show 'Keeping Up with the Kardashians.’ In 2015, Jenner revealed that she is transgender and has become a woman, now known as Caitlyn.

• Track and Field Athlete, Reality Television Star
  (1949–)

In a CNN interview, beach volleyball champion Kerri Walsh-Jennings says she was warned she might lose her sponsorships when she discovered she was six weeks pregnant with her first child at the London Olympics. “Certain brands stepped up when others leave. That’s just the cycle of life,” she said.

• Athlete
  (1978–)

Gracing the cover of Vogue’s February issue, Serena Williams reveals she had an emergency C-section for daughter Alexis Olympia followed by a pulmonary embolism and multiple surgeries. Last week the tennis star bowed out of her first postpartum match, the Australian Open, to recover.

• Athlete, Tennis Player
  (1981–)

Hope Solo proved one of the world's top goalkeepers while helping the U.S. women's soccer team win two Olympic gold medals and the 2015 FIFA Women's World Cup.

• Athlete, Soccer Player
  (1981–)

Mia Hamm is a former American soccer player who competed with the U.S. women's national soccer team for 17 years. She won the Women's World Cup in 1991 and 1999, and took Olympic gold medals in 1996 and 2004.

• Soccer Player, Athlete
  (1972–)

Ryan Lochte is an American swimmer who has won 12 Olympic medals, including six gold, three silver and three bronze. He is the second most decorated male swimmer in Olympic history.

• Swimmer, Athlete
  (1984–)

American decathlete Ashton Eaton won consecutive gold medals at the 2012 and 2016 Olympic Games.

• Track and Field Athlete
  (1988–)

Tennis champion Maria Sharapova became the first Russian woman to win Wimbledon and hold the world's No. 1 ranking.

• Tennis Player, Athlete
  (1987–)

Spanish tennis great Rafael Nadal defeated Kevin Anderson of South Africa at the U.S. Open on Sunday for his 16th Grand Slam title. Read more on his life and tennis career.

• Tennis Player
  (1986–)

Women's tennis star Caroline Wozniacki became the first Danish player to claim the top spot in the world rankings.

• Athlete, Tennis Player
  (1990–)

Track star Lolo Jones has won both USA and World championships in hurdle events, and competed at the 2008, 2012 and 2014 Olympic Games.

• Track and Field Athlete
  (1982–)

American track star Sanya Richards-Ross won Olympic gold in 2004 and 2008, as part of the U.S. 400-meter relay team, and went on to win gold in the women's 400 meters in 2012.

• Track and Field Athlete
  (1985–)

Nathan Adrian is an American swimmer and three-time Olympic gold medalist. At the London Games in 2012, he won two gold medals and one silver.

• Swimmer, Athlete
  (1988–)

Australian Olympic swimmer Ian Thorpe won the most gold medals of any Australian athlete, and was the youngest to win a world championship. He went on to win 10 more.

• Swimmer, Athlete
  (1982–)

British track and field star Jessica Ennis won a gold medal in the heptathlon at the 2012 Summer Olympics in London.

• Track and Field Athlete
  (1986–)

Justin Gatlin sprinted to fame by setting a world record in the 100-meter race. Months later, he tested positive for a banned substance and was suspended. Gatlin is slated to make a comeback at the 2012 Summer Olympics.

• Track and Field Athlete
  (1982–)

Veronica Campbell-Brown is the youngest Jamaican woman to win an Olympic medal. At the 2012 Olympic Games, she became a six-time Olympic medalist.

• Track and Field Athlete
  (1982–)

British swimmer Liam Tancock is a world record holder in the 50-meter and 100-meter backstroke events.

• Swimmer, Athlete
  (1985–)

Swimmer Natalie Coughlin has won more than 10 Olympic medals in her career, including two gold medals at the 2004 Olympics in Athens.

• Athlete, Swimmer
  (1982–)

Anastasia Valeryevna Liukin, better known as Nastia Liukin, is a world-renowned gymnast and Olympian who was named the Olympic individual all-around Champion in 2008.

• Athlete, Gymnast
  (1989–)

Misty May-Treanor is a professional beach volleyball player and three-time Olympic gold medalist. She is the longtime competitive partner of Kerri Walsh-Jennings.

• Athlete
  (1977–)

Olympic gymnast Alicia Sacramone has won dozens of World Championship and U.S. National Championship medals—competing with such teammates as Nastia Liukin and Shawn Johnson—and won a silver medal at the 2008 Summer Olympics.

• Athlete, Gymnast
  (1987–)

Dara Torres is an American swimmer who has taken home 12 Olympic medals and will seek more at the age of 45 in the 2012 Summer Olympic Games in London.

• Athlete, Swimmer
  (1967–)