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Table 3 Performance Level (PL) Criteria

From: 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

  PL1 PL2 PL3 PL4 PL5
Female V̇O2max (ml.kg.min-1) <37 37-47.9 48-53.9 52-58 >58
Male V̇O2max (ml.kg.min-1) <45 45-54.9 55-64.9 65-71 >71