ergogéniques
Conditions
Keywords
Swimming, Beetroot juice, Performance, Ergogenic aid
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.
Interventions
DIETARY_SUPPLEMENTBeetroot 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)
Sponsors
Universidad Politecnica de Madrid
Universidad Francisco de Vitoria
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, 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.
Intervention model description
Parallel allocation was carried out in the two groups
Eligibility
Sex/Gender
ALL
Age
18 Years to 25 Years
Healthy volunteers
No
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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) |
| 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 |
| 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. |
| 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. |
| 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. |
| 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. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| 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. |
| 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. |
| 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. |
Countries
Spain
Outcome results
None listed