Strain, T., Wijndaele, K., Brage, S., Sharp, S., Spiers, A., Price, H., Williams, C., Fraser, C. and Kelly, P. (2021) “Population levels and types of physical activity before and after a national Covid-19 lockdown: Oral Presentation B1.1”, The Health & Fitness Journal of Canada, 14(3). doi: 10.14288/hfjc.v14i3.479.