Supplementation
Conditions
Keywords
Bicarbonate, Rugby, Performance
Brief summary
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.
Interventions
DIETARY_SUPPLEMENTSoidum Bicarbonate
Supplementation with 0.03 g/kg of sodium bicarbonate
DIETARY_SUPPLEMENTPlacebo
0.03 g·kg-1 body mass sodium chloride
Sponsors
Universidad Isabel I
Universidad de Burgos
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
MALE
Healthy volunteers
Yes
Inclusion criteria
* Male rugby players who were competing in the First Spanish National League (Division de Honor A) voluntarily agreed to participate in the study after attending an informative session
Exclusion criteria
* injury or illness on test day
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Capillary blood lactate | At baseline (prior to supplementation), prior to exercise (immediately before beginning exercise protocol), after exercise (immediately after finishing exercise protocol). | Lactate concentrations were measured in a capillary blood sample obtained fromparticipants' fingertips using a portable analyzer (Lactate 2, Arkray, Kyoto, Japan) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Countermovement jump | At baseline (prior to supplementation) and after exercise (immediately after finishing exercise protocol). | 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). |
| Gastrointestinal (GI) symptoms | At baseline (before supplementation), prior to exercise (immediately before beginning exercise protocol), after exercise (immediately after finishing exercise protocol). | 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. |
Countries
Spain
Outcome results
None listed