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10.1136/bmjsem-2020-000911

http://scihub22266oqcxt.onion/10.1136/bmjsem-2020-000911
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34192009!7802394!34192009
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suck abstract from ncbi


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pmid34192009      BMJ+Open+Sport+Exerc+Med 2021 ; 7 (1): e000911
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  • Danger zone assessment in small-sided recreational football: providing data for consideration in relation to COVID-19 transmission #MMPMID34192009
  • Randers MB; Knudsen NS; Thomasen MMD; Panduro J; Larsen MN; Mohr M; Milanovic Z; Krustrup P; Andersen TB
  • BMJ Open Sport Exerc Med 2021[]; 7 (1): e000911 PMID34192009show ga
  • During the COVID-19 pandemic, physical inactivity has increased, and a wide range of sporting activities locked down, with possible long-term implications for public health. Football is the most popular sport worldwide, and recreational football training leads to broad-spectrum health effects. Football is, however, deemed a contact sport with frequent close contact important to consider during COVID-19 pandemic. OBJECTIVES: This study investigated time spent with close contact (danger zone (DZ) within 1.5 m), number of contacts and time per contact, and compared game formats in recreational small-sided football games for young and adult male football players. METHODS: Movement analyses were performed on 10 Hz Global Positioning System (GPS) data collected during various small-sided football games prior to the COVID-19 outbreak. RESULTS: Time spent in the DZ was 4.3-7.9 s/h per per cent infected players, corresponding to 34.3-114.8 s/h if one player was infected. Number of contacts with one infected player was 23.5-87.7 per hour, with an average contact time of 1.1-1.4 s, and a total number of contacts of 311-691 per hour with all players. 53%-65% of all contacts were shorter than 1 s and 77%-85% shorter than 2 s. Trivial to small effects were found for number of participants and area per player, whereas standard of play and playing with/without boards had no effect. CONCLUSION: This study demonstrated that during small-sided football limited time is spent within DZ and that player contacts are brief. Recreational football may therefore more appropriately be deemed as sporting activity with brief, sporadic contact.
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