Effect of Beet Juice on Elite Swimmers.

Not Applicable

Completed

• Conditions: ergogéniques
• Interventions: Dietary Supplement: Beetroot Juice

• Registration Number: NCT05470231
• Lead Sponsor: Universidad Francisco de Vitoria

Brief Summary

Objective: To investigate whether an acute intake of Beetroot Juice (BJ) improved performance factors in a repeated swimming effort at maximum speed in elite swimmers.

Methods: A total of 13 elite swimmers (6 girls and 7 boys) participated in this randomised, double-blind study. In 2 different trials, the swimmers ingested an injection of Beet-It (70 ml placebo (PL) or an injection of Beet-It 70 ml beetroot juice (BJ)) 3 hours before undergoing a 6x100m crawl intermittent maximal speed performance test.

Detailed Description

Not available

Study Timeline

• Study Start: 2020-01-07
• Primary Completion: 2020-01-25
• Study Completion: 2020-01-25
• Status Verified: 2022-07
• Study First Submitted: 2022-07-05
• Study First Submitted QC: 2022-07-20
• Last Update Submitted: 2022-07-20
• Study First Posted: 2022-07-22
• Last Update Posted: 2022-07-22

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 13

Inclusion Criteria

• national and international level swimmers
• healthy swimmers
• no breakfast
• 48 hours with restricted diet of: other sports supplements and beetroot-rich foods

Exclusion Criteria

• be on medication
• having had breakfast
• have brushed your teeth

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Beetroot juice	Beetroot Juice	The swimmers ingested a shot of Beet-It 70 ml beetroot juice (BJ)) 3 hours before undergoing a 6x100m crawl intermittent maximal speed performance test.
Placebo	Beetroot Juice	The swimmers ingested a shot of Beet-It (70 ml placebo (PL)) 3 hours before undergoing a 6x100m crawl intermittent maximal speed performance test.

Primary Outcome Measures

Name	Time	Method
Rate of Perceived Exertion	3 hours after ingestion of the beetroot juice	During the break between 100 and 100, they were asked how hard the effort had been using the subjective RPE scale as in other studies with BJ and swimming.
Total Time	3 hours after ingestion of the beetroot juice	The complete 6x100 main test was recorded with a JVC model GY-HM150E video camera placed on the stand of the facility itself at about 10 m from the start/turn wall (approximately 5 m above and 10 m from the swim lane) to record the entire session. The recording of the session made it possible to calculate the total times, with the program KINOVEA 0.9.5.
Lactate concentration	3 hours post-dose of Beetroot juice or Placebo	After the swimmers exited the water, their finger was wiped dry and their blood lactate concentration was measured with a portable Lactate Pro2 analyzer 1 minute after completing each 100-meter set.
Recovery Total Quality Scale	3 hours after ingestion of the beetroot juice	Just before these same swimmers performed the next 100, they were asked how recovered they felt, using another subjective TQR scale
Parcial Time	3 hours after ingestion of the beetroot juice	The complete 6x100 main test was recorded with a JVC model GY-HM150E video camera placed on the stand of the facility itself at about 10 m from the start/turn wall (approximately 5 m above and 10 m from the swim lane) to record the entire session. The recording of the session made it possible to calculate the split times, with the KINOVEA 0.9.5 program.
Counter Movement Jump	3 hours after ingestion of the beetroot juice	Swimmers completed three repetitions of CMJ with hands on waist using an infrared jumping system (Optojump Next, Microgate, Bolzano, Italy)

Secondary Outcome Measures

Name	Time	Method
Stroke rate	from the day of randomization to the last day of the intervention: up to day 18	The complete 6x100 main test was recorded with a JVC model GY-HM150E video camera placed on the stand of the facility itself at about 10 m from the start/turn wall (approximately 5 m above and 10 m from the swim lane) to record the entire session. The recording of the session made it possible to calculate the stroke rate, with the KINOVEA 0.9.5 program.
Underwater time	from the day of randomization to the last day of the intervention: up to day 18	The complete 6x100 main test was recorded with a JVC model GY-HM150E video camera placed on the stand of the facility itself at about 10 m from the start/turn wall (approximately 5 m above and 10 m from the swim lane) to record the entire session. The recording of the session made it possible to calculate the underwater time, with the KINOVEA 0.9.5 program.
Underwater distance	from the day of randomization to the last day of the intervention: up to day 18	The complete 6x100 main test was recorded with a JVC model GY-HM150E video camera placed on the stand of the facility itself at about 10 m from the start/turn wall (approximately 5 m above and 10 m from the swim lane) to record the entire session. The recording of the session made it possible to calculate the distances of the underwater swim at the start and the second turn, with the program KINOVEA 0.9.5.

Trial Locations

Locations (1)

Universidad Francisco de Vitoria; 🇪🇸 Madrid, Pozuelo De Alarcón, Spain