FSI Selected Publications of the Week

1. SARS-CoV-2 transmission during rugby league matches: do players become infected after participating with SARS-CoV-2 positive players?
Ben Jones, Gemma Phillips, Simon Kemp, Brendan Payne, Brian Hart, Matthew Cross, Keith A Stokes.

Carnegie Applied Rugby Research (CARR) centre, Carnegie School of Sport, Leeds Beckett University, Leeds, UK B. Jones@leedsbeckett.ac.uk.

4 Super League matches in which SARS-CoV-2 positive players were subsequently found to have participated were analysed. Despite tackle involvements and close proximity interactions with SARS-CoV-2 positive players, in-match transmission was not confirmed after 14 days of follow-up, suggesting rugby presents a lower risk of viral transmission than previously predicted.

Br J Sports Med. 2021 Feb 11;bjsports-2020-103714. doi: 10.1136/bjsports-2020-103714. Online ahead of print.


2. Markers of muscle damage and strength performance in professional football (soccer) players during the competitive period.
Vladimir Khaitin, Eduard Bezuglov, Artemii Lazarev, Sergey Matveev, Olga Ivanova, Nicola Maffulli, Evgeny Achkasov.

Pavlov First Saint-Petersburg State Medical University, Saint-Petersburg, Russia.

The association between a serum marker of muscle damage [creatine phosphokinase (CPK)] and the isometric strength of the adductor muscles after games was evaluated in 30 professional football players during two seasons of the russian national top-level championship, finding a significant negative association between the two variables. Along the 72h post-game, CPK levels decreased in association with the muscle strength recovery, with the strength/CPK ratio displaying a U-shaped curve..

Ann Transl Med. 2021 Jan;9(2):113. doi: 10.21037/atm-20-2923.


3. Relationship Between Wellness Index and Internal Training Load in Soccer: Application of a Machine Learning Model.
Enrico Perri (1), Carlo Simonelli (2), Alessio Rossi (3), Athos Trecroci (1), Giampietro Alberti (1), F Marcello Iaia (1).

(1) Dept of Biomedical Science for Health, University of Milan, Milan, Italy. (2) Dept of Medicine and Surgery, University of Insubria, Varese, Italy. (3) Dept of Computer Science, University of Pisa, Pisa, Italy.

To investigate the relationship between the internal training load (TL = rate of perceived exertion × training time) and wellness index (WI) in soccer, the WI and TL data were recorded from 28 subelite players throughout the 2017/2018 season. A significant correlation was reported between daily TL and WI measured the day after, and the machine learning approach used in this study can be used to predict the WI of the players based on a targeted weekly TL.

Int J Sports Physiol Perform. 2021 Feb 9;1-9. doi: 10.1123/ijspp.2020-0093.


4. Injury rates decreased in men’s professional football: an 18-year prospective cohort study of almost 12 000 injuries sustained during 1.8 million hours of play.
Jan Ekstrand, Armin Spreco, Håkan Bengtsson, Roald Bahr.

Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden jan.ekstrand@telia.com.

Within the UEFA Elite Club Injury Study, 3302 players comprising 49 teams (19 countries) were followed from 2000-2001 through 2018-2019, with teams’ medical staff recording and reporting individual player exposure and all time-loss injuries. Total injury incidence fell gradually during the 18-year study period, 3% per season for both training and match injuries. Ligament injury incidence decreased 5% per season during training and 4% per season during match play, while – interestingly- the rate of muscle injuries remained constant. The incidence of reinjuries decreased by 5% per season during both training and matches. Squad availability increased by 0.7% per season for training sessions and 0.2% for matches.

Br J Sports Med. 2021 Feb 5;bjsports-2020-103159. doi: 10.1136/bjsports-2020-103159.