Authors’ contributions
ALV, JDM
JWJB, JL and JDM were initiators of the Supreme Nudge trial and, together with JMS, major contributors in its conceptual design. ALV and EGS were primarily responsible for the design of SNapp. JMS initiated the current study, coordinated the data collection, performed the descriptive analyses and drafted the manuscript together with BACEH. BACEH and ALV assisted in the data collection. ALV performed the descriptive analyses for the components relating to the SNapp intervention and drafted the manuscript related to SNapp and its physical activity components. EGS, JL, JDM and JWJB supervised and provided together with ALV detailed commentary to the manuscript. All authors approved the final version.