Table 1.
Risk of bias graph: review of authors’ judgements about each risk of bias item presented as percentages across all included studies. 
indicates low risk of bias, 
indicates unknown risk of bias, and 
indicates high risk of bias.
| Random sequence generation (selection bias) | Allocation concealment (selection bias) | Blinding of participants and personnel (performance bias) | Blinding of outcome assessment (detection bias) | Incomplete outcome data (attrition bias) | Selective reporting (reporting bias) | Other bias | |
| Mujika et al., 2000 [17] |
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| Bemben et al., 2001 [6] |
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| Cox et al., 2002 [21] |
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| Biwer et al., 2003 [15] |
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| Ostojic 2004 [18] |
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| Claudino et al., 2014 [20] |
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| Williams et al., 2014 [16] |
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| Ramírez-Campillo et al., 2015 [19] |
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| Yáñez-Silva et al., 2017 [7] |
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