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Purpose <p>To investigate the effects of a single dose of cajuína juice physical performance, leukocyte counts, and oxidative stress markers following a 10-km time trial in male runners.</p> Methods <p>A total of nine recreationally trained male runners (32 ± 9.2&#xa0;years; 70.9 ± 8.1&#xa0;kg, 1.71 ± 0.06&#xa0;m, 3.9 ± 1.9 training sessions per week) were randomly assigned to receive either cajuína juice (containing approximately one gram of vitamin C) or a placebo (a similar drink containing 0&#xa0;mg of vitamin C) two hours before exercise, with a one-week washout period between interventions. Blood samples were collected immediately before ingestion and post-exercise. Leukocyte counts, as well as malondialdehyde (MDA), uric acid, and albumin concentrations, were analyzed from the samples.</p> Results <p>Physical performance was not affected by cajuína intake (<i>p</i> &gt; 0.05). Although a time effect (<i>p</i> = 0.01) was observed for MDA concentrations, no condition (<i>p</i> = 0.47) or interaction effects (<i>p</i> = 0.84) were revealed. Additionally, there were no effects of condition, time, and interaction for albumin (<i>p</i> = 0.83, <i>p</i> = 0.37, and <i>p</i> = 0.16, respectively) and uric acid (<i>p</i> = 0.64, <i>p</i> = 0.19, and <i>p</i> = 0.55, respectively) concentrations. No significant or positive changes in leukocyte counts were observed (<i>p</i> &gt; 0.05).</p> Conclusion <p>The single-dose intake of cajuína (<i>Anacardium occidentale L</i>.) does not improve leukocyte count, lipid peroxidation, or physical performance in recreationally trained male runners subjected to a 10-km time trial.</p> Trial registration <p>The study was registered in the Brazilian Clinical Trials Registry (REBEC) under the following registration number: RBR-3cb6qtz. The study was prospectively registered on November 17, 2023.</p>

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A single dose of cajuína does not improve leukocyte count, lipid peroxidation, and physical performance in runners: a randomized, crossover, double‑blind, placebo study

  • 期刊论文

  • 发表日期：

    2025年2月22日

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  • Luiz José Frota Solon-Júnior,
  • Leonardo de Sousa Fortes,
  • José Klinger da Silva Oliveira,
  • Lydiane de Lima Tavares Toscano,
  • Luiz Vieira da Silva Neto

摘要

Purpose

To investigate the effects of a single dose of cajuína juice physical performance, leukocyte counts, and oxidative stress markers following a 10-km time trial in male runners.

Methods

A total of nine recreationally trained male runners (32 ± 9.2 years; 70.9 ± 8.1 kg, 1.71 ± 0.06 m, 3.9 ± 1.9 training sessions per week) were randomly assigned to receive either cajuína juice (containing approximately one gram of vitamin C) or a placebo (a similar drink containing 0 mg of vitamin C) two hours before exercise, with a one-week washout period between interventions. Blood samples were collected immediately before ingestion and post-exercise. Leukocyte counts, as well as malondialdehyde (MDA), uric acid, and albumin concentrations, were analyzed from the samples.

Results

Physical performance was not affected by cajuína intake (p > 0.05). Although a time effect (p = 0.01) was observed for MDA concentrations, no condition (p = 0.47) or interaction effects (p = 0.84) were revealed. Additionally, there were no effects of condition, time, and interaction for albumin (p = 0.83, p = 0.37, and p = 0.16, respectively) and uric acid (p = 0.64, p = 0.19, and p = 0.55, respectively) concentrations. No significant or positive changes in leukocyte counts were observed (p > 0.05).

Conclusion

The single-dose intake of cajuína (Anacardium occidentale L.) does not improve leukocyte count, lipid peroxidation, or physical performance in recreationally trained male runners subjected to a 10-km time trial.

Trial registration

The study was registered in the Brazilian Clinical Trials Registry (REBEC) under the following registration number: RBR-3cb6qtz. The study was prospectively registered on November 17, 2023.