Effect of food sources of nitrate, polyphenols, L-arginine and L-citrulline on endurance exercise performance: a systematic review and meta-analysis of randomised controlled trials

Table 3 Performance Level (PL) Criteria

	PL1	PL2	PL3	PL4	PL5
Female V̇O_2max (ml.kg.min^-1)	<37	37-47.9	48-53.9	52-58	>58
Male V̇O_2max (ml.kg.min^-1)	<45	45-54.9	55-64.9	65-71	>71

ISSN: 1550-2783