Using game-level data, this study examines what impact the mid-season winter break in football fixtures has on technical performance across European football leagues. Thirty-eight technical measures pertaining to the actions of passing and shooting are assessed for 3494 team match observations from the German Bundesliga, Spanish La Liga, French Ligue 1 and English Premier League across 5 seasons from 2013/14 to 2017/18. Kruskal–Wallis tests were conducted to investigate the differences between three groups: PREPRE (4–6 fixtures prior to the break); PRE (1–3 fixtures prior to the break); and POST (1–3 fixtures after the break). Shooting performance declined significantly post winter break in the German Bundesliga (13/21 metrics) which had an average break of 32 days. Passing performance deteriorated significantly in the French Ligue 1 (4/17 metrics) which had an average break of 19 days. The Spanish La Liga had a 13-day break on average and remained unaffected as did the English Premier League which had no mid-season break. Evidence suggests that a mid-season winter break of less than 13 days will not affect technical performance levels but breaks that last longer can act as a catalyst that halt momentum and cause performances to deteriorate.
⚽ Does a break in play affect team momentum? ⚽— Stuart McErlain-Naylor (@biomechstu) May 5, 2020
🇩🇪 32 days - Shooting (13/21 params) declined
🇫🇷 19 d - Passing (4/17) declined
🇪🇸 13 d - unaffected
🏴 no break - unaffected
A pleasure to assist @UOS_SportSci colleagues with this one in @ijpas_editor https://t.co/f2D2bMaXsN https://t.co/o1Vkz921PW