Contact times in professional football before and during the SARS-CoV-2 pandemic: Tracking data from the German Bundesliga.
Eur J Sport Sci
; : 1-8, 2022 Feb 24.
Article
in English
| MEDLINE | ID: covidwho-2283233
ABSTRACT
The global SARS-CoV-2 pandemic led to a lockdown in team sports in March 2020. Because the risk of virus transmission seems to correlate with the duration of close contacts, data on contact times are necessary to assess the risk of virus transmission in sports. In this study, an optical tracking system was used to determine contact times between players of the two highest men's professional football leagues in Germany in the 2019-20 season and in the first half of the 2020-21 season. Contacts between players were defined as being within a two-metre radius during matches and were differentiated as either match-specific or non-match-specific. In total, 918 matches with 197,087 contacts were analysed. The mean overall contact time of one-to-one situations of 36 s (SD ± 66) before the lockdown was reduced to 30 s after the lockdown (SD ± 60) (p < 0.0001). In professional football, contacts between two players infrequently occur within a two-metre radius, averaging less than 35 s. Only 36 player pair contacts lasted for more than 15â
min (0.00018%). The mean accumulated contact time per player with all others was 10.6 ± 6.9â
min per match, with a decrease from 11.6 ± 7.0â
min before the lockdown to 10.0 ± 6.6â
min (p < 0.0001) after lockdown in the season 2019-20. The SARS-CoV-2 pandemic has resulted in a reduction in match-specific contacts of 25%. It seems questionable if such short contacts in open-air sports may lead to considerable virus transmission.Highlights After the SARS-CoV-2 lockdown, the contact times of a football player with one other player as well as with all other players were significantly reduced in the 2019-20 season and in the first half of the 2020-21 season.Only 3.7-4.7% of all contacts between two players lasted longer than 2â
min, and only 0.9% of contacts lasted longer than 5â
min.Non-match-specific situations, such as goal celebrations, are an important part of football and constitute up to 33% of the player pairs' contact time; limiting such situations may further reduce contacts between players.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Type of study:
Prognostic study
Language:
English
Journal:
Eur J Sport Sci
Year:
2022
Document Type:
Article
Affiliation country:
17461391.2022.2032837
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