Constantinou, Demitri, Georgia Torres, Natalia Neophytou, Peter Fourie, Xenia Buntting, and Philippe Gradidge. “‘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”. South African Journal of Sports Medicine 33, no. 1 (April 30, 2021): 1–6. Accessed April 20, 2024. https://journals.assaf.org.za/index.php/sajsm/article/view/9053.