Effects of Beetroot Juice Intake on Performance and Physiological Parameters

Campus docent Sant Joan de Déu-Universitat de Barcelona

Status: Completed

Conditions: Pulmonary Function; Nutrition, Healthy

Treatments: Dietary Supplement: Beetroot juice ingestion; Dietary Supplement: Placebo ingestion

Study type: Interventional

Funder types: Other

Identifiers

NCT06073275

CDSJD

Details and patient eligibility

About

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.

Full 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.

Enrollment: 10 patients

Sex: Male

Ages: 30+ years old

Volunteers: Accepts Healthy Volunteers

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.

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Triple Blind

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10 participants in 2 patient groups, including a placebo group

Beetroot juice intake

Experimental group

Description:

Beetroot juice was administered 3 h before the start of the rowing ergometer test since the peak of nitrite in the blood occurs 2-3 h after nitrate ingestion. Beetroot juice was provided in a 140 mL maroon plastic bottle with no label. Participants were provided with a randomized bottle containing 140 mL (\~12.8 mmol, \~808 mg of nitrate) of BRJ Beet-It-Pro Elite Shot concentrate (Beet IT; James White Drinks Ltd., Ipswich, UK).

Treatment:

Dietary Supplement: Beetroot juice ingestion

Placebo intake

Placebo Comparator group

Description:

Placebo was administered 3 h before the start of the rowing ergometer test. Placebo was provided in a 140 mL maroon plastic bottle with no label. Participants were provided with a randomized bottle containing 140 mL. The placebo drink was made by dissolving in 1 liter of water 2g of powdered SUPER BEETROOT (\~ 0.01 mmol, 0.620 mg of nitrate, diet, food, Poland), 100% natural beetroot juice and organic label, and adding lemon juice to imitate the flavor and texture of the beetroot juice drink

Treatment:

Dietary Supplement: Placebo ingestion