First person – Myriam de Graaf and Juul Hubert

First Person is a series of interviews with the first authors of a selection of papers published in Biology Open, helping early-career researchers promote themselves alongside their papers. Myriam de Graaf and Juul Hubert are co-first authors on ‘Influence of arm swing on cost of transport during walking’, published in BiO. Myriam and Juul are both (research) master's students in the lab of Andreas Daffertshofer and Raôul Oudejans–John van der Kamp at the Faculty of Behavioural and Human Movement Sciences, Vrije Universiteit, Amsterdam, investigating human movement sciences. Myriam's interest lies predominantly in motor control, neuroscience and biomechanics, while Juul is focused on applications in (elite) sport.