Acute Caffeine Ingestion on Futsal Performance

Study Overview
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Brief Summary
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Caffeine supplementation has been recognized such as an useful strategy for improving performance in intermittent sports, however caffeine ingestion in futsal has been barely studied. In this randomized placebo-controlled study, we investigated the effects of acute caffeine supplementation in improving neuromuscular performance and physical match activity in futsal players.

Detailed Description
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To date, no previous investigation has studied the effect of acute caffeine ingestion on futsal performance during futsal-specific testing and during a simulated match. Therefore, the aim of this investigation was to establish the effects of acute caffeine intake on futsal-specific tests (e.g. futsal kicking velocity) and match-play running performance in male futsal players.

Official Title
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Effects of Acute Caffeine Ingestion on Futsal Performance in Sub-elite Players

Conditions
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Caffeine, Placebo

Intervention / Treatment
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* Dietary Supplement: Caffeine
* Dietary Supplement: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Sub-elite men futsal players Exclusion Criteria: Intolerance to caffeine, Suffering from any chronic pathology or an injury in the month prior to the investigation Use of medicines or dietary supplements during the study.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 35 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Caffeine supplementation<br>Acute caffeine supplementation | Dietary Supplement: Caffeine<br>* Gelatine capsule with caffeine (3 mg/kg body mass of caffeine) (Bulk Powders, London, United Kingdom). The capsule containing the treatment was ingested with 150 mL of water 60 minutes before the onset of the experiment to allow substance absorption.<br>|
| Placebo Comparator: Placebo supplementation<br>Acute placebo supplementation | Dietary Supplement: Placebo<br>* Gelatine capsule with placebo (Cellulose; Guinama, Valencia, Spain). The capsule containing the treatment was ingested with 150 mL of water 60 minutes before the onset of the experiment to allow substance absorption.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Changes in futsal match-play demands (m/min) | Using a wireless inertial movement unit system | 48-hours | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Changes in maximal jump height (cm) | Infrared beam jump system | 48-hours | 
| Changes in 20-m sprint test (s) | Time to complete 10-m and 20-m sprints using photocell timing gates | 48-hours | 
| Futsal kicking velocity and accuracy test (km/h) | Throwing velocity using a radar gun | 48-hours |