Mike Rennie held the Symers Professor of Physiology at the University of Dundee for many years and was subsequently at the University of Nottingham in Derby. He was a member of the Physiological Society from 1978 and served on the Editorial Board of Journal of Physiology and on Council; he delivered the G.L. Brown Prize lecture in 2004/5. He is best known for his work in human physiology where he pioneered the use of stable isotopes in metabolic studies.