Table 2. Assessment of reporting quality of included studies.

Study (year)	Downs and Black Checklist items
	Reporting						Internal Validity
	1	2	3	6	7	10	16	18	20	Σ
Balsalobre-Fernández et al.(2018) [28]	1	1	1	1	0	1	1	1	1	8
Balsalobre-Fernández et al.(2019) [29]	1	1	0	1	1	1	1	0	1	7
Balsalobre-Fernández et al.(2021) [37]	1	1	1	1	0	1	1	0	1	7
Banyard et al.(2017) [6]	1	1	1	1	1	1	1	0	1	8
Benavides-Ubric et al. (2020) [38]	1	1	1	1	0	0	1	1	1	7
Caven et al. (2020) [43]	1	1	1	1	1	1	1	0	1	8
Fernandes et al. (2021) [39]	1	1	0	1	0	1	1	0	1	6
Garcia-Ramos et al.(2018a) [9]	1	1	1	1	0	0	1	1	1	7
Garcia-Ramos et al.(2019) [30]	1	1	1	1	1	1	1	1	1	9
Hughes et al.(2019) [36]	1	1	1	1	0	0	1	1	1	7
Janicijevic et al. (2021) [40]	1	1	1	1	0	1	1	0	1	7
Jidovtseff et al.(2011) [21]	1	1	0	1	0	0	1	0	1	5
Jiménez-Alonso et al.(2020) [31]	1	1	1	1	1	1	1	1	1	9
Jukic et al.(2020) [18]	1	1	1	1	0	1	1	1	1	8
Lake et al.(2017) [32]	1	1	1	1	1	0	1	1	1	8
Loturco et al.(2016) [35]	1	1	0	1	1	0	1	0	1	6
Loturco et al.(2017) [17]	1	1	0	1	1	0	1	0	1	6
Loturco et al.(2018) [15]	1	1	0	1	0	0	1	0	1	5
Pérez-Castilla et al.(2019a) [42]	1	1	0	1	1	0	1	1	1	7
Pérez-Castilla et al.(2019b) [19]	1	1	0	1	0	1	1	0	1	6
Pérez-Castilla et al.(2020) [33]	1	1	0	1	1	1	1	1	1	8
Picerno et al.(2016) [13]	1	1	1	1	1	1	1	1	1	9
Ruf et al.(2018) [34]	1	1	1	1	0	0	1	0	1	6
Sayers et al.(2018) [44]	1	1	0	1	1	0	1	1	1	7
Thompson et al. (2021) [41]	1	1	1	1	1	1	1	1	1	9

Note: Σ = sum.