Pillay, Julian David, Tracy L Kolbe-Alexander, Karin I Proper, Simone A Tomaz, Willem van Mechelen, and Estelle V Lambert. 2014. “Steps That Count: Pedometer-Measured Physical Activity, Self-Reported Physical Activity and Current Physical Guidelines ‒ How Do They Relate?”. South African Journal of Sports Medicine 26 (3): 77-81. https://journals.assaf.org.za/index.php/sajsm/article/view/102.