Videos: Lance Armstrong confesses to Oprah Winfrey

Disgraced cyclist Lance Armstrong has admitted using banned substances during his career, in an explosive interview with Oprah Winfrey.

The 'open field' interview revealed the secrets behind Armstrong's victories. He started taking performance enhancing drugs since the mid 90s, denying and defying it for years, to an extent of suing people who were telling the truth.

Following this, he admits that doping was necessary for victory, as wining seven times in a row was humanly impossible and he did have a 'ruthless desire to win, win it all cost'.

He has now been stripped of all his seven World Tour titles and most recently, the Olympic bronze medal.

Although he apologised, he said: 'There's people that will hear this and will never forgive me, I understand that'.

See full clips from footage courtesy of OWN: Oprah Winfrey Network: