As a child Koshkin trained in cross-country skiing, and changed to boxing at the age of 11, following his elder brother. He first trained at Spartak under Boris Grekov, who previously raised the Olympic medalist Sergei Sivko. In 1978 Koshkin was included to the Soviet national team. In the 1980 Olympic final he lost to Armando Martínez, but avenged the loss in the world championship final in 1982.
During his boxing career Koshkin fractured his hands 36 times. Hand injuries eventually forced him to retire in 1983 with a record of 180 wins out of 240 bouts. In retirement he coached boxers at Dynamo and later opened his own boxing school. He died aged 53 after suffering two strokes.
References
{{Footer World Amateur Champions Light Middleweight}}{{DEFAULTSORT:Koshkin, Aleksandr}}{{USSR-boxing-bio-stub}}{{USSR-Olympic-medalist-stub}} 11 : 1959 births|2012 deaths|Light-middleweight boxers|Boxers at the 1980 Summer Olympics|Olympic boxers of the Soviet Union|Olympic silver medalists for the Soviet Union|Olympic medalists in boxing|Soviet male boxers|AIBA World Boxing Championships medalists|Medalists at the 1980 Summer Olympics|Honoured Masters of Sport of the USSR