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| ID | Type | Description | Link |
|---|---|---|---|
| Bicarbonaterugby | Registry Identifier | Bicarbonaterugby |
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| Name | Class |
|---|---|
| Universidad Isabel I | UNKNOWN |
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The objetive of the study was to determine whether sodium bicarbonate supplementation improves athletic performance and/or reduces fatigue in elite rugby players.
The participants were 17 elite rugby players. Half of the participants receive sodium bicarbonate (0.3 g/kg body weight), the other half receive a placebo (salt). Ingestion of the supplementation/placebo occured 90 minutes before high-intensity rugby-specific training Variables analysed were measure at baseline, prior to exercise, during exercise and after exercise.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Bicarbonate | Active Comparator | Supplementation with 0.3 g/kg of sodium bicarbonate |
|
| Placebo | Placebo Comparator | Supplementation with placebo: 0.03 g·kg-1 body mass sodium chloride |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Soidum Bicarbonate | Dietary Supplement | Supplementation with 0.03 g/kg of sodium bicarbonate |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Capillary blood lactate | Lactate concentrations were measured in a capillary blood sample obtained fromparticipants' fingertips using a portable analyzer (Lactate 2, Arkray, Kyoto, Japan) | At baseline (prior to supplementation), prior to exercise (immediately before beginning exercise protocol), after exercise (immediately after finishing exercise protocol). |
| Measure | Description | Time Frame |
|---|---|---|
| Countermovement jump | For the CMJ, subjects started from an upright position withhands on waist and then executed a countermovement jump by flexing the knees to 90◦and jumping as high as possible. During the flight stage, they were instructed to keep theirknees extended to 180◦, without hyperextending the hips . Jump height was measuredon an infrared platform (Optojump, Microgate, Bolzano, Italy). |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Universidad de Burgos | Burgos | Spain |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 41893591 | Derived | Couce B, Baos S, Moreno-Villanueva A, Recarey-Rodriguez AE, Mielgo-Ayuso J, Martinez-Ferran M. Effects of Sodium Bicarbonate Supplementation on Performance and Gastrointestinal Symptoms During a High-Intensity Training Session in Elite Rugby Players: A Double-Blind Randomized Controlled Trial. Sports (Basel). 2026 Mar 4;14(3):100. doi: 10.3390/sports14030100. |
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Confidential data regarding a rugby club
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| Placebo |
| Dietary Supplement |
0.03 g·kg-1 body mass sodium chloride |
|
| At baseline (prior to supplementation) and after exercise (immediately after finishing exercise protocol). |
| Gastrointestinal (GI) symptoms | Questionnaires consisted of nine 100-mm visual analog scales (VASs). The VASs were anchored at each end with no symptom on the left-hand side and severe symptom on the right-hand side. Participants were asked to rate the severity of their symptoms. If they were experiencing no symptoms, they circled the appropriate words, for example, no nausea. If they were experiencing some symptoms, they indicated their overall rating by placing a vertical mark on the line. The VASs were used to measure symptoms of nausea, flatulence, stomach cramping, belching, stomachache, bowel urgency, diarrhea, vomiting, and stomach bloating. | At baseline (before supplementation), prior to exercise (immediately before beginning exercise protocol), after exercise (immediately after finishing exercise protocol). |