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 (Sep. 2021). DOI:https://doi.org/10.14288/hfjc.v14i3.479.