Born in Addis Abeba, Ethiopia, the athlete began running during primary school. He ran his first competitive race at 15 for his local regional club. Inspired by Haile Gebrselassie, he aspired to emulate his hero after watching him win the 1996 Atlanta Olympics. He currently runs for Muger Cement in Addis Abeba and is coached by Woldemeskel Kostre and Tolosa Kotu.

| Season | Event | Rank |
|---|---|---|
| 2012 | Men 10000m | 4 |
| 2008 | Men 10000m | G Gold |
| 2008 | Men's 5000m | G Gold |
| 2004 | Men 10000m | G Gold |
| 2004 | Men's 5000m | S Silver |
In August 2009, he won his fourth consecutive world 10,000m title at the IAAF World Championships in Berlin. This victory equalled Haile Gebrselassie's record for the most world championship titles in the event. His previous wins were in Paris (2003), Helsinki (2005), and Osaka (2007).
In 2004, he won a gold and silver medal at the Olympic Games. He also set world records in the 5000m and 10,000m within nine days. Additionally, he set another world record over 5000m indoors and won a third consecutive long and short course world cross country double. These achievements earned him the Male Athlete of the Year award by the International Association of Athletics Federations (IAAF).
Throughout his career, he faced several injuries. In 2011, he ruptured a muscle during the 10,000m event at the world championships and suffered a knee injury. In 2006, a minor injury during training forced him out of competition for a week. Before the 2004 Olympic Games, he was hampered by an Achilles injury.
In 2003, he suffered from an illness suspected to be haemoglobin deficiency before the World Cross Country Championships. An Achilles injury in 2002 prevented him from participating in the track season. Severe abdominal pains affected his performance at the Rome Golden League meet in 2001.
He resides in Addis Abeba with his wife Danawit Gebregziabher. Despite initial resistance from his parents who wanted him to pursue a professional career as a teacher or doctor, they are now proud of his achievements.
He believes in not being scared of other runners, regardless of their records. He enjoys discussing race tactics with teammates like Haile Gebrselassie. For him, each race requires different strategies, and it is essential to adapt during the race itself.
He serves as a goodwill ambassador for UNICEF, demonstrating his commitment to giving back to society. Additionally, he was honoured with a pop song 'Kenenisa Anbessa' by Ethiopian vocalist Teddy Afro, celebrating his gold medal at the 2004 Olympic Games and his generosity towards Haile Gebrselassie.
In January 2012, he and 34 other Ethiopian athletes were briefly banned from competition by the Ethiopian Athletics Federation for missing a mandatory training camp. The ban was lifted after a week following discussions between the federation and athletes.
In March 2007, he experienced an unexplainable loss of form after failing to defend his World Cross Country crown in Mombasa, Kenya. Despite consulting many doctors who found no illness, he struggled with power loss and inconsistent training performance.
A tragic event occurred in January 2005 when his fiancée Alem Techale collapsed and died of a suspected heart attack while training with him. Techale was also an international standard athlete and had won the 1500m at the 2003 World Youth Championships.
The athlete's journey is marked by significant achievements and challenges that have shaped his career. His dedication to running and resilience through setbacks continue to inspire many aspiring athletes worldwide.
Born in Addis Abeba, Ethiopia, the athlete began running during primary school. He ran his first competitive race at 15 for his local regional club. Inspired by Haile Gebrselassie, he aspired to emulate his hero after watching him win the 1996 Atlanta Olympics. He currently runs for Muger Cement in Addis Abeba and is coached by Woldemeskel Kostre and Tolosa Kotu.