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| Name | Class |
|---|---|
| Eastern Mediterranean University | OTHER |
| Northumbria University | OTHER |
| Universidad Francisco de Vitoria | OTHER |
| Ankara University |
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Objective:
To evaluate the effects of different caffeine mouth rinse concentrations (1%, 2%, and 3%) on Running Anaerobic Sprint Test (RAST) performance in female team-sport athletes.
Main Questions:
Method:
Thirteen trained female football and handball players (23.0 ± 4.5 years) completed four randomized, double-blind, crossover conditions (1%, 2%, and 3% caffeine mouth rinses, and placebo). Each trial involved six 35 m sprints separated by 10 s of rest. RPE was recorded immediately after each session.
Objective:
To evaluate the acute effects of different caffeine mouth rinse concentrations (1%, 2%, and 3%) on anaerobic sprint performance and perceived exertion in trained female team-sport athletes. The study sought to determine whether this non-ingestive ergogenic strategy could enhance high-intensity running performance and reduce effort perception.
Main Questions:
Is there an optimal caffeine concentration that balances potential performance benefits with reduced perceived exertion?
Method:
Thirteen trained female athletes (mean age 23.0 ± 4.5 years) competing in football and handball participated in a randomized, double-blind, placebo-controlled, crossover trial. Each athlete completed four experimental conditions: placebo, 1% caffeine mouth rinse, 2% caffeine mouth rinse, and 3% caffeine mouth rinse. In each session, participants performed a Running Anaerobic Sprint Test (RAST) consisting of six maximal 35 m sprints separated by 10 seconds of passive recovery. The RPE was assessed immediately after each test using a 1-10 scale.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Placebo (water) | Placebo Comparator | Placebo: Mouth rinse with plain water, containing no caffeine, serving as the control condition. |
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| Low mouth rinse caffeine concentration | Experimental | Low caffeine concentration: Mouth rinse containing 1% caffeine solution (based on weight/volume). |
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| Moderate mouth rinse caffeine concentration | Experimental | Moderate caffeine concentration: Mouth rinse containing 2% caffeine solution (based on weight/volume). |
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| High mouth rinse caffeine concentration | Experimental | Moderate caffeine concentration: Mouth rinse containing 3% caffeine solution (based on weight/volume). |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Placebo: Mouth rinse with plain water | Dietary Supplement | Placebo: Mouth rinse with plain water, containing no caffeine, serving as the control condition. |
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| Measure | Description | Time Frame |
|---|---|---|
| Running-based anaerobic sprint test (RAST protocol) | The RAST was comprised of six 35 m sprints at maximum effort, each of which was followed by a 10 s passive rest period (including deceleration phase). Participants rinsed the solution in the final 5 s of the rest period accompanied by the counting of the tester, and then sprint back to the first timing gate with "GO" command. This was repeated until six sprints had been accomplished. Participants began to sprint running for a maximum of one step before the timing gate and were instructed not to decelerate before passing through the timing gate. Using a system of photocells (Newtest Powertimer 300-series, Newtest Oy, Tyrnävä, Finland), which was placed at the beginning and the end of the 35 m, the duration of each 35 m sprint running time was recorded. Using time of each sprint attempt, 1-) fastest sprint time, 2-) mean sprint time, and 3-) fatigue index were recorded | 2-week |
| Measure | Description | Time Frame |
|---|---|---|
| Rating of perceived exertion (RPE) | Perceived exertion during each trial was assessed immediately after the Running Anaerobic Sprint Test (RAST) using a 1-10 numerical scale points, where: 1 = Very, very light effort (minimal exertion, easy to continue) 2-3 = Light effort (comfortable, mild strain) 4-5 = Moderate effort (noticeable breathing and muscle activation) 6-7 = Hard effort (challenging but sustainable for a short time) 8-9 = Very hard effort (significant discomfort, near maximal effort) 10 = Maximal effort (unable to continue beyond current level, exhaustion) This scale provided a subjective measure of the athletes' internal load, complementing the objective performance metrics from the sprint test. |
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Inclusion Criteria
Exclusion Criteria
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Eastern Mediterranean University | Mersin | SBF C 116 | Turkey (Türkiye) |
IPD will be shared if previously is required
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| OTHER |
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| Experimental: Low mouth rinse caffeine concentration (1%) | Dietary Supplement | Arm Description: Low caffeine concentration: Mouth rinse containing 1% caffeine solution (based on weight/volume). |
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| Moderate caffeine concentration (2% caffeine solution weight/volume). | Dietary Supplement | Moderate caffeine concentration: Mouth rinse containing 2% caffeine solution (weight/volume). |
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| High caffeine concentration (3% caffeine solution weight/volume). | Dietary Supplement | High caffeine concentration: Mouth rinse containing 3% caffeine solution (weight/volume). |
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| 2-weeks |