Constantinou, D.; Torres, G. .; Neophytou, N. .; Fourie, P.; Buntting, X.; Gradidge, P. ‘I’m Doing It for myself’: Using a Smartphone-Based Exercise Service During the COVID-19 Lockdown in the Faculty of Health Sciences, University of the Witwatersrand, South Africa. SA J Sports Med 2021, 33, 1-6.