Kunalan first came into running in 1963, at the age of 20. Formerly a football player, Kunalan switched to running when his PE teacher commended him for his fast-moving legs after noticing him running while chasing the ball.[8] He participated in the 1964 Summer Olympics as part of the Malaysian 4 × 100 m relay team with Malaysian sprint legend Mani Jegathesan, and subsequently represented Singapore after it left the federation.
C Kunalan taught six years in Tiong Bahru Primary School and thirteen years in Dunearn Secondary Technical School before joining the National Institute of Education in 1980.[1][11] Kunalan became an assistant professor there.[12] He specialized in functional anatomy and exercise physiology, and conducted practical classes in fitness and conditioning. Kunalan left the institute in 2010.[13]