Melanin started as a cross-country skier, but changed to biathlon while. His strong skiing base helped him win all his titles, as his shooting skills were mediocre. Because of poor shooting, he finished outside of the podium at his first Olympics in 1960. He improved a lot by the next Games, where he showed not only best skiing time, but also clean shooting. He finished more than 3 minutes ahead of his rivals, which remains the largest victory margin in any Olympic biathlon event. Domestically Melanin won only two titles, in the 20 km in 1959 and 1966. After retiring from competitions Melanin worked as a biathlon coach and managed a cross-country skiing and biathlon complex in Kirov Oblast. He received posthumously the International Biathlon Union Honorary Award.