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Fig. 4 | Journal of the International Society of Sports Nutrition

Fig. 4

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

Fig. 4Fig. 4

Polyphenol supplementation forest plot. Abbreviations – CI, confidence interval; GXT, graded exercise test; IGXT, intermittent graded exercise test; ITTE, intermittent time to exhaustion; k, number of trials; n, sample size; PL, performance level; Qb, between-group Q-statistic; SMD, standardised mean difference (Hedge’s g); supp., supplementation; TT, time-trial; TTE, time to exhaustion; Vmax, maximal running velocity.

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