ABSTRACT First Person is a series of interviews with the first authors of a selection of papers published in Journal of Cell Science, helping researchers promote themselves alongside their papers. Christian Hoegsbjerg is first author on ‘ Fibre type differences in the organisation of mononuclear cells and myonuclei at the tips of human myofibres’, published in JCS. Christian is a PhD student in the lab of Professor Abigail Mackey at the Institute of Sports Medicine Copenhagen, Bispebjerg Hospital, Copenhagen, Denmark, investigating the form, function and regeneration of the myotendinous junction.