Effect of the Beetroot Juice in Portuguese Swimmers

Not Applicable

Completed

• Conditions: Ergogenics
• Interventions: Dietary Supplement: Beetroot Juice; Combination Product: Placebo

• Registration Number: NCT05657093
• Lead Sponsor: Universidad Francisco de Vitoria

Brief Summary

Objective: To investigate whether an acute intake of beet juice (BJ) improved the factors of total and split times (performance), stroke frequency and CMJ (biomechanics), lactate and HR (physiology) and RPE-TQR (psychophysiological) in a repeated (performance), stroke frequency and CMJ (biomechanics), lactate and HR (physiology) and RPE-TQR (psychophysiological) in a repeated maximal speed swimming effort in elite swimmers.

Methods: A total of 18 elite swimmers participated in this randomized, double-blind study. In 2 different trials, swimmers ingested a Beet-It injection (70 ml placebo (PL) or a Beet-It injection of 70 ml beet juice (BJ)) 3 hours before undergoing a 2x6x100 m intermittent maximal speed crawl performance test.

Detailed Description

Not available

Study Timeline

• Study Start: 2022-04-30
• Primary Completion: 2022-05-07
• Study Completion: 2022-05-07
• Status Verified: 2022-11
• Study First Submitted: 2022-12-01
• Study First Submitted QC: 2022-12-09
• Last Update Submitted: 2022-12-09
• Study First Posted: 2022-12-20
• Last Update Posted: 2022-12-20

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 18

Inclusion Criteria

1. • national and international level swimmers
2. • healthy swimmers
3. • no breakfast
4. • 48 hours with restricted diet of: other sports supplements and beetroot-rich foods

Exclusion Criteria

1. -be on medication
2. • having had breakfast
3. • have brushed your teeth

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Placebo	Beetroot Juice	The swimmers ingested a shot of Beet-It (70 ml placebo (PL)) 3 hours before undergoing a 2x6x100m crawl intermittent maximal speed performance test.
Beetroot juice	Beetroot Juice	The swimmers ingested a shot of Beet-It 70 ml beetroot juice (BJ)) 3 hours before undergoing a 2x6x100m crawl intermittent maximal speed performance test.
Placebo	Placebo	The swimmers ingested a shot of Beet-It (70 ml placebo (PL)) 3 hours before undergoing a 2x6x100m crawl intermittent maximal speed performance test.
Beetroot juice	Placebo	The swimmers ingested a shot of Beet-It 70 ml beetroot juice (BJ)) 3 hours before undergoing a 2x6x100m crawl intermittent maximal speed performance test.

Primary Outcome Measures

Name	Time	Method
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)
Parcial Time	3 hours after ingestion of the beetroot juice	The complete 2x6x100 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.
Lactate concentration	3 hours post-dose of Beetroot juice or Placebo	After qeach even series of 100m (2nd, 4th, 6th and 3' rest), their finger was wiped dry and their blood lactate concentration was measured with a Lactate Pro2 portable analyzer 1 minute after completing each 100m series.
Rate of Perceived Exertion	3 hours after ingestion of the beetroot juice	During every 100m, they were asked how much effort they had exerted using the subjective RPE scale as in other studies with BJ and swimming.
Recovery Total Quality Scale	3 hours after ingestion of the beetroot juice	Before the swimmers performed the next 100m, they were asked how recovered they felt, using another subjective TQR scale.
Total Time	3 hours after ingestion of the beetroot juice	The complete 2x6x100 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.

Secondary Outcome Measures

Name	Time	Method
Stroke rate	from the day of randomization to the last day of the intervention: up to day 7	The complete 2x6x100 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.

Trial Locations

Locations (1)

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