Table 2.

Risk of bias in studies comparing changes in VO_2max between SIT and MICT.

	Selection bias		Performance bias	Detection bias	Attrition bias	Reporting bias	Other bias
Reference	Random sequence generation	Allocation concealment	Blinding participants and personnel	Blinding outcome assessment	Incomplete outcome data	Selective reporting
Bailey et al. (2009)97	Unclear	Unclear	Unclear	Unclear	Unclear	High	Low
Bonafiglia et al. (2016)52	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Burgomaster et al. (2008)116	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Cocks et al. (2013)35	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Cocks et al. (2016)36	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Foster et al. (2015)37	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Gillen et al. (2016)79	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Higgins et al. (2016)80	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Keating et al. (2014)38	Low	Unclear	Unclear	Uncleara	Low	High	Highb
Kiviniemi et al. (2014)76	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Kong et al. (2016)39	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Macpherson et al. (2011)40	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Martins et al. (2016)49	Unclear	Unclear	Unclear	Unclear	Unclearc	High	Low
Matsuo et al. (2014)50	Unclear	Unclear	Unclear	Low	Low	High	Low
Mazurek et al. (2014)98	Unclear	Unclear	Unclear	Unclear	Unclear	High	Low
McGarr et al. (2014)41	Unclear	Unclear	Unclear	Unclear	Low	High	Low
McKay et al. (2009)77	Unclear	Unclear	Unclear	Unclear	Unclear	High	Low
Nalcakan (2014)78	Unclear	Unclear	Unclear	Unclear	Unclearc	High	Low
Schaun et al. (2018)42	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Scribbans et al. (2014)59	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Skleryk et al. (2013)71	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Sun et al. (2019)48	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Tabata et al. (1996)43	Unclear	Unclear	Unclear	Unclear	Unclear	High	Highd
Tanisho and Hirakawa (2009)44	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Trapp et al. (2008)72	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Zelt et al. (2014)62	Unclear	Unclear	Unclear	Unclear	Low	High	Low
Zhang et al. (2021)75	Unclear	Unclear	Unclear	Unclear	Unclear	High	Low
Total (unclear or high (%))	26 (96%)	27 (100%)	27 (100%)	25 (93%)	7 (26%)	27 (100%)	2 (7%)

^a Unclear which outcome(s) were assessed in a blinded fashion.

^b Group means were input for missing individual data.

^c Dropout rate >20%.

^d No randomization.

Abbreviations: MICT = moderate-intensity continuous training; SIT = sprint interval training; VO_2max = maximal oxygen uptake.