Effect of the Beetroot Juice in Portuguese Swimmers

Sponsor

Universidad Francisco de Vitoria (Other)

Overall Status

Completed

CT.gov ID

NCT05657093

Collaborator

Universidad Politécnica de Madrid. (Other), Instituto Politécnico de Bragança (Other)

Enrollment

Location

Arms

Actual Duration (Days)

78.3

Patients Per Site Per Month

Study Details

Study Description

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.

Condition or Disease	Intervention/Treatment	Phase
Ergogenics	Dietary Supplement: Beetroot Juice Combination Product: Placebo	N/A

Study Design

Study Type:

Interventional

Actual Enrollment :

18 participants

Allocation:

Randomized

Intervention Model:

Parallel Assignment

Intervention Model Description:

Parallel allocation was carried out in the two groupsParallel allocation was carried out in the two groups

Masking:

Triple (Participant, Investigator, Outcomes Assessor)

Masking Description:

Triple blinded (Participant, Investigator and Outcomes Assessor) The participant was blinded not knowing the treatment to which he was submitted, investigator and outcome assessor responsible for collecting the results, without commenting on the group from which the subject came.

Primary Purpose:

Treatment

Official Title:

"Effects of Beetroot Juice os Sport Performane in Elite Swimmers. A Randomized Clinical Trial"

Actual Study Start Date :

Apr 30, 2022

Actual Primary Completion Date :

May 7, 2022

Actual Study Completion Date :

May 7, 2022

Arms and Interventions

Arm	Intervention/Treatment
Active Comparator: 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.	Dietary Supplement: Beetroot Juice The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3) Combination Product: Placebo The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3)
Placebo Comparator: 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.	Dietary Supplement: Beetroot Juice The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3) Combination Product: Placebo The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3)

Arm

Intervention/Treatment

Active Comparator: 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.

Dietary Supplement: Beetroot Juice

The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3)

Combination Product: Placebo

The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3)

Placebo Comparator: 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.

Dietary Supplement: Beetroot Juice

The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3)

Combination Product: Placebo

The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3)

Outcome Measures

Primary Outcome Measures

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.
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.
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

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.

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years to 25 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Inclusion Criteria:

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