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Effect of acute ingestion of beetroot juice either devoid of (Placebo; open bar or symbols) or containing (Nitrate; solid bar or symbols) 11.2 mmol of NO3- on time to fatigue (top panel) and peak O2 consumption (VO2peak; bottom panel) during an incremental exercise test in patients with heart failure with reduced ejection fraction. Values are mean ± SE for n=8; individual results are also shown (circles, men; squares, women). *Nitrate significantly higher than Placebo: P<0.05.
