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World Health Organization 2020 guidelines on physical activity and sedentary behaviour Bull, Fiona C.; Al-Ansari, Salih S.; Biddle, Stuart et al 10.1136/bjsports-2020-102955 Physical inactivity is associated with a higher risk for severe COVID-19 outcomes: a study in 48 440 adult patients Sallis, Robert; Young, Deborah Rohm; Tartof, Sara Y. et al 10.1136/bjsports-2021-104080 The Stanford Hall consensus statement for post-COVID-19 rehabilitation Barker-Davies, Robert M.; O'Sullivan, Oliver; Senaratne, Kahawalage Pumi Prathima et al 10.1136/bjsports-2020-102596 What does best practice care for musculoskeletal pain look like? Eleven consistent recommendations from high-quality clinical practice guidelines: systematic review Lin, Ivan; Wiles, Louise; Waller, Rob et al 10.1136/bjsports-2018-099878 Wake up and smell the coffee: caffeine supplementation and exercise performance-an umbrella review of 21 published meta-analyses Grgic, Jozo; Grgic, Ivana; Pickering, Craig et al 10.1136/bjsports-2018-100278 Systematic video analysis of ACL injuries in professional male football (soccer): injury mechanisms, situational patterns and biomechanics study on 134 consecutive cases Della Villa, Francesco; Buckthorpe, Matthew; Grassi, Alberto et al 10.1136/bjsports-2019-101247 Cardiorespiratory considerations for return-to-play in elite athletes after COVID-19 infection: a practical guide for sport and exercise medicine physicians Wilson, Mathew G.; Hull, James H.; Rogers, John et al 10.1136/bjsports-2020-102710 International Olympic Committee consensus statement: methods for recording and reporting of epidemiological data on injury and illness in sport 2020 (including STROBE Extension for Sport Injury and Illness Surveillance (STROBE-SIIS)) Bahr, Roald; Clarsen, Ben; Derman, Wayne et al 10.1136/bjsports-2019-101969 Recalibrating the risk of hamstring strain injury (HSI): A 2020 systematic review and meta-analysis of risk factors for index and recurrent hamstring strain injury in sport Green, Brady; Bourne, Matthew N.; van Dyk, Nicol et al 10.1136/bjsports-2019-100983 Risk of knee osteoarthritis after different types of knee injuries in young adults: a population-based cohort study Snoeker, Barbara A. M.; Turkiewicz, Aleksandra; Magnusson, Karin et al 10.1136/bjsports-2019-100959 High intensity exercise for 3 months reduces disease activity in axial spondyloarthritis (axSpA): a multicentre randomised trial of 100 patients Sveaas, Silje Halvorsen; Bilberg, Annelie; Berg, Inger Jorid et al 10.1136/bjsports-2018-099943 Sleep and the athlete: narrative review and 2021 expert consensus recommendations Walsh, Neil P.; Halson, Shona L.; Sargent, Charli et al 10.1136/bjsports-2020-102025 Which specific modes of exercise training are most effective for treating low back pain? Network meta-analysis Owen, Patrick J.; Miller, Clint T.; Mundell, Niamh L. et al 10.1136/bjsports-2019-100886 Is the COVID-19 lockdown nudging people to be more active: a big data analysis Ding, Ding; del Pozo Cruz, Borja; Green, Mark A. et al 10.1136/bjsports-2020-102575 Physical inactivity and non-communicable disease burden in low-income, middle-income and high-income countries Katzmarzyk, Peter T.; Friedenreich, Christine; Shiroma, Eric J. et al 10.1136/bjsports-2020-103640 Time before return to play for the most common injuries in professional football: a 16-year follow-up of the UEFA Elite Club Injury Study Ekstrand, Jan; Krutsch, Werner; Spreco, Armin et al 10.1136/bjsports-2019-100666 Successful return to professional men's football (soccer) competition after the COVID-19 shutdown: a cohort study in the German Bundesliga Meyer, Tim; Mack, Dietrich; Donde, Katrin et al 10.1136/bjsports-2020-103150 Effects of sedentary behaviour interventions on biomarkers of cardiometabolic risk in adults: systematic review with meta-analyses Hadgraft, Nyssa T.; Winkler, Elisabeth; Climie, Rachel E. et al 10.1136/bjsports-2019-101154 Physical activity and the risk of SARS-CoV-2 infection, severe COVID-19 illness and COVID-19 related mortality in South Korea: a nationwide cohort study Lee, Seung Won; Lee, Jinhee; Moon, Sung Yong et al 10.1136/bjsports-2021-104203 Epidemiology of injuries in professional football: a systematic review and meta-analysis Lopez-Valenciano, Alejandro; Ruiz-Perez, Inaki; Garcia-Gomez, Alberto et al 10.1136/bjsports-2018-099577