The effect of acute beetroot juice supplementation on 100-m swimming performance and some physiological variables across the menstrual cycle

Document Type : Research Paper I Open Access I Released under (CC BY-NC 4.0) license

Authors

1 Department of sport Sciences, Faculty of Social Sciences, Imam Khomeini International University, Qazvin, Iran

2 Department of Physical Education, Faculty of Social Sciences, Imam Khomeini International University, Qazvin, Iran

Abstract

Introduction: the present study was conducted with the aim of determining the effect of acute beetroot juice supplementation on 100m swimming performance and some physiological variables during different phases of the menstrual cycle. Method: 10 young professional female swimmers voluntarily participated in a semi-experimental, double-blind crossover design. After tracking and determining the menstrual phases in the samples, each subject on days 2-5 at the beginning of the cycle (follicular phase) and days 17-21 of the cycle (luteal phase) with and without consuming beetroot juice supplement (50 grams of beetroot powder after breakfast and an hour and half before swimming), he swam 100 meters. Sport performance, rating of perceived exertion, heart rate, systolic blood pressure and urinary pH were evaluated after swim. Results: The findings showed that there is no significant difference between the follicular and luteal phases of the menstrual cycle in the two situations of consuming placebo or beet juice supplement in the evaluated variables . Also, there is no significant difference between the consumption of placebo and beet juice supplement in both follicular and luteal phases regarding swimming time of 100 meters . Also, the heart rate after swimming 100 meters in the supplement group was significantly lower than the placebo only in the follicular phase .

Conclusion: In general, it seems that acute supplementation of beetroot juice has no effect on 100m swimming performance in female during different phases of the menstrual cycle,

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Research in Exercise Nutrition
Volume 3, Issue 3
Completing and uploading accepted articles
May 2025

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History

  • Receive Date: 28 April 2025
  • Revise Date: 11 May 2025
  • Accept Date: 12 May 2025
  • First Publish Date: 12 May 2025

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