Key result
Acute ingestion of nitrate-rich beetroot juice increased repetitions-to-failure in the bench press compared to placebo (24 vs. 23, p < 0.05), with no differences in back squat or muscle oxygenation.
Why the study?
The study was conducted to assess the effects of acute and short-term nitrate-rich beetroot juice supplementation on performance outcomes and muscle oxygenation during resistance exercise.
Does nitrate-rich beetroot juice supplementation improve performance outcomes and muscle oxygenation during resistance exercise in recreationally active males?
RCT (n=14)
Double-blind
Randomized crossover
Does nitrate-rich beetroot juice supplementation improve performance outcomes and muscle oxygenation during resistance exercise in recreationally active males?
Absolute Event Rate: 24% vs 23%
p-value: p=< 0.05
Acute nitrate-rich beetroot juice supplementation may slightly improve muscular endurance during upper body resistance exercise, but does not affect muscle oxygenation or lower body performance.
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Acute beetroot juice may enhance bench press endurance; leaves open effects on other resistance outcomes or muscle oxygenation.
Tan et al. (2022) conducted an RCT in Healthy (recreationally active) (n=14). Nitrate-rich beetroot juice vs. Nitrate-depleted beetroot juice (0.10 mmol NO3- per day) was evaluated on Repetitions-to-failure (RTF) in bench press at 60% 1RM (p=< 0.05). Acute ingestion of nitrate-rich beetroot juice increased repetitions-to-failure in the bench press compared to placebo (24 vs. 23, p < 0.05), with no differences in back squat or muscle oxygenation.
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