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Effects of Beetroot Juice Intake on Performance and Physiological Parameters

Not Applicable
Completed
Conditions
Pulmonary Function
Nutrition, Healthy
Registration Number
NCT06073275
Lead Sponsor
Campus docent Sant Joan de Déu-Universitat de Barcelona
Brief Summary

This study was a randomized, double-blind, crossover design for 3 weeks. In the first week, a researcher explained all the experimental procedures to the participants. In the following two weeks, the participants attended the Exercise Physiology laboratory to be assessed in 2 rowing ergometer sessions, separated from each other by a washout period of 7 days, under the same environmental conditions.

In both strictly identical sessions, the participants randomly ingested beetroot juice (BRJ) or placebo (PL) 3 hours before the start of the tests.

Detailed Description

Three hours after BRJ or PL intake, the participants began the 2,000-meter rowing ergometer test. Before starting (pretest) and at the end of the tests (posttest), blood oxygen saturation, rating of perceived exertion (RPE), and blood lactate measurements were taken. During the rowing ergometer tests, performance parameters and cardiorespiratory variables were recorded.

Recruitment & Eligibility

Status
COMPLETED
Sex
Male
Target Recruitment
10
Inclusion Criteria
  1. national and/or international level;
  2. without cardiovascular, respiratory, metabolic, neurological or orthopedic disorders that may affect the performance of the rowing ergometer test;
  3. no consumption of drugs or medicines;
  4. no smoking;
  5. Informed consent to participate in the study signed by all rowers
Exclusion Criteria
  1. Ingestion of nutritional supplements taken in the three months prior to the start of the study;
  2. no following the guidelines established by the nutrition professional.

Study & Design

Study Type
INTERVENTIONAL
Study Design
CROSSOVER
Primary Outcome Measures
NameTimeMethod
Cardiorespiratory performance: relative oxygen uptakethrough study completion, an average of 3 weeks

V̇O2max (mL/kg/min)

Rowing performance: meter per strokethrough study completion, an average of 3 weeks

Meters

Rowing performance: Time trialthrough study completion, an average of 3 weeks

minutes:seconds (mm:ss)

Cardiorespiratory performance: absolute oxygen uptakethrough study completion, an average of 3 weeks

V̇O2max (L/min)

Cardiorespiratory performance: ventilatory efficiencythrough study completion, an average of 3 weeks

slope of Ventilation/Carbon dioxide production

Rowing performance: Mean Power outputthrough study completion, an average of 3 weeks

Watts

Metabolic performance: lactatethrough study completion, an average of 3 weeks

mmol/L

Secondary Outcome Measures
NameTimeMethod
Cardiorespiratory performance: minute ventilationthrough study completion, an average of 3 weeks

minute ventilation in L/min

Rowing performance: strokesthrough study completion, an average of 3 weeks

Mean strokes per minute

Cardiorespiratory performance: Maximum heart ratethrough study completion, an average of 3 weeks

beats/min

Cardiorespiratory performance: Mean heart ratethrough study completion, an average of 3 weeks

beats/min

Saturationthrough study completion, an average of 3 weeks

percentage

Scale of Perceived exertion ratio (RPE)through study completion, an average of 3 weeks

Scale from 0 to 10. 0 = rest; 10 = maximum effort

Trial Locations

Locations (1)

Campus Docent Sant Joan de Déu. Universitat de Barcelona

🇪🇸

Sant Boi De Llobregat, Barcelona, Spain

Campus Docent Sant Joan de Déu. Universitat de Barcelona
🇪🇸Sant Boi De Llobregat, Barcelona, Spain

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