In 1992 Armstrong turned professional with the Motorola Cycling Team, the successor of 7-Eleven team.
In 1993, Armstrong won 10 one-day events and stage races, but his breakthrough victory was the World Road Race Championship held in Norway.
He stopped swimming-only races after seeing a poster for a junior triathlon, called the Iron Kids Triathlon, which he won at age 13.
In the 1987–1988 Tri-Fed/Texas ("Tri-Fed" was the former name of USA Triathlon), Armstrong was ranked the number-one triathlete in the 19-and-under group; second place was Chann Mc Rae, who became a US Postal Service cycling teammate and the 2002 USPRO national champion.
In the aftermath of his fall from grace, a CNN article wrote that "The epic downfall of cycling's star, once an idolized icon of millions around the globe, stands out in the history of professional sports." He was named after Lance Rentzel, a Dallas Cowboys wide receiver. The next year, his mother married Terry Keith Armstrong, a wholesale salesman, who adopted Lance that year. At the age of 12, Armstrong started his sporting career as a swimmer at the City of Plano Swim Club and finished fourth in Texas state 1,500-meter freestyle.
In the 1996 Olympic Games, he finished 6th in the time trial and 12th in the road race.
In August 1996 following the Leeds Classic, Armstrong signed a 2-year, m deal with the French Cofidis Cycling Team.
At a hearing on Tuesday to determine what could be accepted as evidence at the trial in May, government officials sought to convince the judge that allowing Armstrong to say that “everyone was doing it” would “put the entire sport of cycling on trial”, and mislead the jury into giving Armstrong a “free pass” just because other riders were also doping.
Expert witnesses branded ‘not competent to testify’ in 0m Lance Armstrong lawsuit However U. District Judge Christopher Cooper partly agreed with Armstrong, saying that he would allow the former rider to present evidence of widespread doping in professional cycling as part of his defence, with Armstrong’s legal team likely to argue that the issue of doping didn’t play a part in the US Postal Service’s decision to sponsor the team.
Between 20, he raced with Team Radio Shack, the UCI Pro Team he helped found. Armstrong had been the subject of doping allegations ever since winning the 1999 Tour de France.