Methods:Īfter familiarization, nine club-level competitive male cyclists were assigned in a randomized, crossover design to consume 0.5 L of beetroot juice (BR containing ∼6.2 mmol of nitrate) or 0.5 L of nitrate-depleted BR (placebo, PL containing ∼0.0047 mmol of nitrate), ∼2.5 h before the completion of a 4- and a 16.1-km TT. The present study investigated the effects of acute dietary nitrate supplementation on power output (PO), V˙O 2, and performance during 4- and 16.1-km cycling time trials (TT). However, it is presently unknown whether it may enhance performance during simulated competition. Dietary nitrate supplementation has been shown to reduce the O 2 cost of submaximal exercise and to improve high-intensity exercise tolerance.
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