Table 5 (Inter)national comparison of overall, match, and training IRs
References | League(s), Nr. of team(s) of the respective league | Season(s), n = number of included seasons | Overall IR per 1000 football hours | Match IR per 1000 match hours | Training IR per 1000 training hours |
|---|---|---|---|---|---|
Current study media-based | 1st German 18/18 | 2014/15–2020/21 n = 7 | 5.5 | 25.9 | 3.4 |
Bjorneboe, Bahr [6] | 1st Norwegian 14/14 | 2002–2007 n = 6 | 4.8 | Not provided | Not provided |
Noya Salces, Gomez-Carmona [9] | 1st Spanish 16/20 | 2008/09 n = 1 | 5.7 | 43.5 | 3.6 |
Stubbe, van Beijsterveldt [3] | 1st Dutch 8/18 | 2009/10 n = 1 | 6.2 | 32.8 | 2.8 |
Hagglund, Walden [32] | 1st Swedish 11/14 | 2005 n = 1 | 7.7 | 28.1 | 4.7 |
Hagglund, Walden [8] | 1st Swedish 12/14 | 2001–2002 n = 2 | 7.1/8.2 | 22.7/25.9 | 5.1/5.3 |
Hagglund, Walden [7] | 1st Danish 8/12 | January–June 2001 2nd leg of one season | 14.4 | 28.2 | 11.2 |
Orhant, Chapellier [31] | 1st French 20/20, 16 teams participating in both seasons | 2018/19, 2020/21 n = 2 | Not provided | 24.4/29.4 | Not provided |
Lopez-Valenciano, Ruiz-Perez [33] | 1st French, Spanish, Italian, English, and German (pooled data) | Systematic review and meta-analysis, studies until February 2018 included | 7.6 | 35.5 | 3.6 |
Ekstrand, Spreco [34] UEFA-ECIS | UEFA Champions League (the best 1st league clubs of 10 European countries) | 2001/02–2018/19 n = 18 | 6.6 | 23.8 | 3.4 |
aus der Fünten, Faude [4] | 1st and 2nd German 5/18 1st, 2/18 2nd league | 2008/09–2009/10 2nd legs of two seasons | 5.9/6.6 | 26.5/31.5 | 2.7/4.0 |
Faude, Meyer [5] media-based | 1st German 18/18 | 2005/06 n = 1 | Not provided | 37.5 | Not provided |