Population level physical activity before and during the first national COVID-19 lockdown: A nationally representative repeat cross-sectional study of 5 years of Active Lives data in England.
Strain T, Sharp SJ, Spiers A, Price H, Williams C, Fraser C, Brage S, Wijndaele K, Kelly P
The Lancet regional health. Europe. Dec 2021
(DOI : 10.1016/j.lanepe.2021.100265)