Elizabeth Muthuka is runner form Kenya

Kenya

Kenya , officially known as the Republic of Kenya, is a country in East Africa that lies on the equator, with the Indian Ocean to its south-east...

 who concentrates on 400 metres. Her surname is sometimes spelled Muthoka.

Muthuka won 100, 200 and 400 metres races at the 2005 Kenyan Athletics Championships and has won number of national championships since then. She competed at the 2006 African Championships in Athletics

2006 African Championships in Athletics

The 15th African Championships in Athletics were held in Mauritius between August 9 and August 13, 2006. The event was staged at Stade Germain Comarmond in Bambous, Black River district...

 400 metres race. She reached the semifinals at the 2007 All-Africa Games

2007 All-Africa Games

The 9th All-Africa Games took place between 11 and 23 July 2007 in Algiers, the capital city of Algeria. Algiers is the first city to hold All-Africa Games for a second time. The 1978 All-Africa Games were held there...

. At the 2008 African Championships

2008 African Championships in Athletics

The 16th African Championships in Athletics was held in Addis Ababa, the capital city of Ethiopia, from April 30 to May 4, 2008. The competition venue was the Addis Ababa Stadium. It is the largest Athletics event held in Ethiopia to date...

 she finished 7th in 400 metres final and helped the Kenyan 4*400 metres relay team to reach the final. However, she did not take part in the final, where Kenya finished second.

She broke the 400 metres Kenyan record

Kenyan records in athletics

The following are the national records in athletics in Kenya maintained by Athletics Kenya .-Men:-Women:-Men:-Women:+ = en route to a longer distanceA = affected by altitude# = not officially ratifiedOT = oversized track-External links:*...

 at the Kenyan Championships in July 2008 by running 51.53. The previous record, 51.56 by Ruth Waithera

Ruth Waithera

Ruth Waithera Nganga is a retired sprinter from Kenya.Waithera won bronze over 200 metres at the 1978 All-Africa games and 1979 African Championships...

 was set in 1984. A week later she lowered the record to 50.82 at the Kenyan Olympic trials. She was selected to compete for Kenya at the 2008 Summer Olympics

2008 Summer Olympics

The 2008 Summer Olympics, officially known as the Games of the XXIX Olympiad, was a major international multi-sport event that took place in Beijing, China, from August 8 to August 24, 2008. A total of 11,028 athletes from 204 National Olympic Committees competed in 28 sports and 302 events...

. She had, however, failed a doping test at the Kenyan athletics championships and thus did not compete at the Olympics. She tested positive for Nandrolone

Nandrolone

Nandrolone is an anabolic steroid that may be present naturally in the human body, albeit in minute quantities of less than 0.4 ng/ml. Nandrolone is most commonly sold commercially as its decanoate ester and less commonly as a phenylpropionate ester...

 and was given a two-year ban by Athletics Kenya

Athletics Kenya

Athletics Kenya is the governing body for the sport of athletics in Kenya. It is a member of the IAAF and Confederation of African Athletics. AK organises athletics competitions held in Kenya. It also sends Kenyan teams to international championships. Isaiah Kiplagat is the current chairman of...

. In Addition, her 400 metres Kenyan records were erased.

She had returned to competition in early 2011.