The Effect of Beetroot Juice Supplementation Dose on Neuromuscular Performance During Resistance Exercise

Summary

Dietary nitrate supplementation, administered in the form of nitrate-rich beetroot juice, has been shown to improve exercise performance and may have more pronounced effects on exercise that requires high-power and high-velocity muscle contraction such as weightlifting and body-mass resisted exercise (i.e, resistance exercise). However, limited data are available that have examined the potential performance enhancing effect of beetroot juice in resistance exercise. Moreover, there is no information on the dose of nitrate required for performance enhancing effects during resistance exercise which limits its widespread use to enhance performance. Therefore, the investigators will assess if supplementing the diet with nitrate-rich beetroot juice impacts resistance exercise performance (e.g., power, velocity), when compared to supplementing the diet with nitrate-depleted beetroot juice (i.e. placebo). The investigators will also investigate the dose-response effect of beetroot juice on resistance exercise performance by providing a low, moderate, and high nitrate dose of concentrated beetroot juice. The results of this study will improve understanding of whether beetroot juice influences resistance exercise performance and will provide insight on whether different doses of beetroot juice influence the efficacy of nitrate supplementation on resistance exercise performance. Together, these data will guide supplementation strategies for enhancing resistance exercise performance.

Conditions

• High Nitrate Dose
• Moderate Nitrate Dose
• Low Nitrate Dose
• Nitrate-depleted Dose

Interventions

DIETARY_SUPPLEMENT

BR-HIGH

4 x nitrate-rich beetroot juice shots (26 mmol of nitrate)

DIETARY_SUPPLEMENT

BR-MOD

2 x nitrate-rich beetroot juice shots + 2 x nitrate-depleted beetroot juice shot (12 mmol of nitrate)

DIETARY_SUPPLEMENT

BR-LOW

1 x nitrate-rich beetroot juice shot + 3 x nitrate-depleted beetroot juice shots (6 mmol of nitrate)

DIETARY_SUPPLEMENT

PL

4 x nitrate-depleted beetroot juice shots (0 mmol of nitrate)

Sponsors & Collaborators

• Pepperdine University

  lead OTHER

Principal Investigators

• Rachel Tan, PhD · Pepperdine University

Study Design

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

DOUBLE

Model

CROSSOVER

Eligibility

Min Age

18 Years

Max Age

45 Years

Sex

MALE

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2023-05-23

Primary Completion

2024-04-28

Completion

2024-06-30

Countries

• United States

Study Locations