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| Name | Class |
|---|---|
| University of Seville | OTHER |
| University of Greenwich | OTHER |
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Beta-alanine is considered as ergogenic aids with good to strong evidence for improving sports performance in specific sports context scenarios. However, most of the studies has been realized in endurance, with limited evidence in intermittent sports, especially in racket sports. Thus, the aim of this study was to explore the effects of 4-weeks ingestion of beta-alanine on neuromuscular performance in well-trained tennis players.
Fourteen tennis players (23.3 ±3.7 years) between 50-250 national tennis ranking participated in this study. Participants were randomly divided into two groups that realized a neuromuscular battery after beta-alanine (4.8 gr/daily during 4-weeks) or placebo (i.e., fructose) (4.8 grams/daily during 4-weeks). Before and after the supplementation period tennis performed a neuromuscular test battery in a tennis court consisted in different test such as; serve velocity, countermovement jump, isometric handgrip strength, 10-m sprint, modified 5-0-5 agility test and repeated sprint ability. After 48 h of the realization of neuromuscular test battery, tennis players performed VO2max consumption test (i.e., treadmill).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Beta-alanine supplementation | Active Comparator | Beta-alanine (4.8 grams) pills (Crown Nutrition, Haro, Spain) in four doses each day during a 4-week supplementation period. |
|
| Placebo supplementation | Placebo Comparator | Placebo (4.8 grams) pills (Crown Nutrition, Haro, Spain) contain fructose (300mg) and excipients (1200 mg) such as cellulose, calcium phosphate, silicon dioxide and magnesium stearate in four doses each day during a 4-week supplementation period. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Beta-alanine supplementation | Dietary Supplement | In a randomized order, two groups (n=7) was randomly assigned to beta-alanine and placebo during a 4-weeks period |
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| Measure | Description | Time Frame |
|---|---|---|
| Repeated sprint ability test. | Infrared photocells system (Microgate, Italy) | 4-weeks |
| VO2 max treadmill test | Using VO2 max analyzer (Ergostik, Geratherm Respiratory, Ergostik, Geratherm, Germany) | 4-weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Serve velocity | Stroke velocity radar gun (Radar Pocket, South Korea) | 4-weeks |
| Contermovement Jump | Contact Jump (Chronojump, Spain) |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Iñaki Quintana García-Milla, PhD | Universidad Francisco de Vitoria | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Universidad Francisco de Vitoria | Pozuelo de Alarcón | Madrid | 28223 | Spain |
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|
| 4-weeks |
| 10m sprint | Infrared photocells system (Microgate, Italy) | 4-weeks |
| Isometric handgrip strength | Hand held dynamometer (Takei, Japan) | 4-weeks |
| Modified agility test 5-0-5 | Infrared photocells system (Microgate, Italy) | 4-weeks |