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| Name | Class |
|---|---|
| Camilo Jose Cela University | OTHER |
| Universidad Politecnica de Madrid | OTHER |
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This study analyzed the effects of 15 days of beetroot juice supplementation on different performance measures in elite Spanish distance runners
This study analyzed the effects of 15 days beetroot juice supplementation on the VO2max, running economy, exercise perceived exertion, muscle power and locomotion mechanics in a group of 12 elite Spanish middle and long distance runners
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Intervention group | Experimental | Participants in this group ingested nitrate-rich beetroot juice for 15 days |
|
| Placebo group | Placebo Comparator | Participants in this group ingested a placebo drink for 15 days |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| nitrate-rich beetroot juice | Dietary Supplement | Nitrate-rich beetroot juice supplementation was administered for 15 consecutive days to participants in this arm |
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| Measure | Description | Time Frame |
|---|---|---|
| Running economy | The cost of running (oxygen consumption) at different speeds | Changes from baseline at 15 days |
| Measure | Description | Time Frame |
|---|---|---|
| Time to exhaustion | Time that the athlete endured running until voluntarily ending the exercise | Changes from baseline at 15 days |
| Muscle power | Ability to produce muscle power in a jump test |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Carlos Balsalobre-Fernández, PhD | Universidad Autonoma de Madrid | Principal Investigator |
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| ID | Type | URL | Comment |
|---|---|---|---|
| Individual Participant Data Set | View IPD |
Coded database with data of the pre-post measures will be made available
Indefinitely available
Open access
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Twelve elite distance runners were randomly assigned to either an intervention group or a placebo group. Participants in each group consumed beetroot juice or a placebo drink for 15 consecutive days.
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Twelve participants were randomly assigned to either an intervention group or a placebo group, and a 4 digits code based on their Spanish ID card were used to code their names.
Then, an independent researcher prepared individual bags with either a 15-days worth of placebo drinks or beetroot drinks, and gave it to the athletes. Then, this person was withdrawn for the research procedures.
Finally, another group of researchers, without knowing what athlete was on each group (intervention or placebo), conducted the performance tests pre and post 15 days of supplementation, and another group analyzed the data once collected.
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| Placebo | Dietary Supplement | Placebo drink |
|
| Changes from baseline at 15 days |
| Muscle oxygenation | Saturation of O2 in the vastus lateralis during exercise | Changes from baseline at 15 days |
| RPE | Rate of perceived exertion during the exercise | Changes from baseline at 15 days |
| Running mechanics | Contact and flight time of each step during the exercise | Changes from baseline at 15 days |