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Abstract
No differences were observed in energy metabolism or substrate utilization after 1 week of co-supplementation with 3.5 g beetroot extract and 6 g citrulline in elite rowers.
- Citrulline and beetroot extract supplements are thought to enhance exercise performance but their effects on metabolic outcomes remain unclear.
- Twenty elite male rowers participated in a randomized, double-blind, placebo-controlled crossover trial.
- No significant differences were found in respiratory exchange ratio, energy expenditure, or gross efficiency between the supplement and placebo groups.
- Data from performance tests showed no interaction effects on oxygen consumption, carbon dioxide production, or substrate oxidation.
- Results suggest that longer supplementation periods or higher doses may be necessary to observe effects on metabolism.
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