LONDON , England ( CNN ) -- A Paralympic gold medal winner will not be allowed to compete in the Beijing Olympics later this year after athletics ' governing body ruled that his specially-designed prosthetic limbs gave him an unfair advantage over other runners . Paralympic champion Oscar Pretorius competed in two able-bodied athletics meetings in 2007 . The International Association of Athletics Federations ruled that Oscar Pistorius ' shock-absorbing carbon-fiber prosthetics gave him a `` demonstrable mechanical advantage '' compared to able-bodied athletes . Pistorius , nicknamed the `` Blade Runner '' because of his prosthetics , won gold in the 200 meters and a bronze medal in the 100m at the 2004 Paralympic Games in Athens . The 21-year-old South African , who lost his legs when he was a baby , has since competed in two able-bodied races in which he finished second and last . In November , the IAAF carried tests on Pistorius over two days at the German Sport University in Cologne to determine if his prosthetic limbs , known as `` cheetah '' prosthetics , could be considered a technical aid . A team of more than 10 scientists used high speed cameras , special equipment to measure ground reaction forces and a three-dimensional scanner to record body mass . The IAAF determined that Pistorius was able to run `` with about 25 per cent less energy expenditure '' than other sprinters , it said in a statement released on its Web site Monday . `` The positive work , or returned energy , from the prosthetic blade is close to three times higher than with the human ankle joint in maximum sprinting , '' the statement said . `` This means that the mechanical advantage of the blade in relation to the healthy ankle joint of an able-bodied athlete is higher than 30 per cent . '' The IAAF completed its report on December 19 and had planned to release its findings last week , but it delayed the announcement to give Pistorius more time to look over the report , said spokesman Nick Davies . Pistorius , who holds the Paralympic world records in the 100m , 200m and 400m , was born without fibulae in his legs -- which were amputated below the knee when he was 11 months old . The runner finished second in an able-bodied race in Rome in 2007 , then came last and was subsequently disqualified for stepping out of his lane in a race in Sheffield , England later the same year . The IAAF said that after the Italian race , evidence suggested an athlete with prosthetic limbs performed differently than an able-bodied athlete , and it agreed with Pistorius that more tests were needed . The IAAF does not prohibit prosthetic limbs in able-bodied sports , but it does ban technical aids . Pistorius is reported to be considering an appeal against the verdict . Athletics South Africa said it would immediately apply the decision which does does not affect Pistorius ' eligibility for Paralympic events . `` It 's unfortunate because he could have boosted team athletics at the Olympics at Beijing because he had the potential to qualify , '' said Leonard Chuene , president of Athletics South Africa . `` There 's not much we can do , '' Chuene added . `` It rules him out with immediate effect . We use the IAAF rule book . If we had our rules and our own competition it would be easier . It is a huge problem . '' E-mail to a friend .
Double-amputee sprinter Oscar Pistorius ineligible to run at Beijing Olympics . The South African athlete was cleared of murder in the shooting death of his girlfriend Reeva Steenkamp last year. The 21-year-old Pistorius has set three world records in Paralympic events .