Ergogenics
Conditions
Keywords
swimming, beet, swim, nitrate, intermittent sports, ergogenic aids
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.
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)
COMBINATION_PRODUCTPlacebo
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
Instituto Politécnico de Bragança
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
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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. |
| 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. |
| 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) |
| 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. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| 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. |
Countries
Spain
Outcome results
None listed