Beetroot Juice Ingestion Effects on Field Hockey Performance.

Study Overview
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Brief Summary
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Scientific evidence supports that only a few dietary supplements have reported good evidence for improving sports performance, between we can mention beetroot juice supplementation with doses > 5 mmol of NO3-. In this randomized placebo-controlled study, we investigated the effects of BJ acute supplementation in improving neuromuscular performance and match-play demands in female field hockey players.

Detailed Description
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Beetroot juice supplementation has demonstrated good evidence for improving sports performance, however, benefits in team sports, especially in female athletes, are underrepresented. In this randomized placebo-controlled study, we investigated the effects of beetroot juice acute supplementation in improving neuromuscular performance and match-play demands.Testing sessions will comprise a neuromuscular test battery consisting of a countermovement jump (CMJ), isometric handgrip strength, 20-m sprint and repeated sprint ability test, followed by a 20-minute simulated field hockey Physical match activity (distances, speeds, accelerations and decelerations) will be monitored in real-time using an inertial tracking system

Official Title
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Acute Effects of Beetroot Juice Ingestion on Neuromuscular Performance and Match-play Demands in Elite Female Hockey Players.

Conditions
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Hockey, Nitrates

Intervention / Treatment
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* Dietary Supplement: Beetroot juice
* Dietary Supplement: Beetroot juice placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Elite female field hockey players (playing in First Field Hockey Division). More than 8 years of field hockey training experience. Exclusion Criteria: Concurrently participating in other studies. Contraindications associated to beetroot ingestion. Health problems or musculoskeletal injuries 6 months previous to study realization

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

Sexes Eligible for Study
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Female

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: Beetroot supplementation<br>Acute beetroot juice supplementation | Dietary Supplement: Beetroot juice<br>* One serving 70 mL of beetroot juice (6.4 mmol of NO3-; Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) 3 h before initiating the testing session.<br>Dietary Supplement: Beetroot juice placebo<br>* One serving 70 mL of beetroot juice placebo (0.04 mmol of NO3-; Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) 3 h before initiating the testing session.<br>|
| Placebo Comparator: Placebo supplementation<br>Acute placebo supplementation | Dietary Supplement: Beetroot juice<br>* One serving 70 mL of beetroot juice (6.4 mmol of NO3-; Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) 3 h before initiating the testing session.<br>Dietary Supplement: Beetroot juice placebo<br>* One serving 70 mL of beetroot juice placebo (0.04 mmol of NO3-; Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) 3 h before initiating the testing session.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Changes in simulated field hockey match demands (m/min) | Using a global position system (GPS) | 1 week | 
| Changes in repeated-sprint-ability test (s) | Time to complete the modified repeated sprint ability test using photocell timing gates | 1 week | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Changes in sprint time (s) | Time to complete 20-m sprints using photocell timing gates | 1 week | 
| Changes in maximal jump height (cm) | Maximal jump height using a contact platform | 1 week | 
| Changes in maximal isometric handgrip strength (N) | Using a hand-held dynamometer | 1 week | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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dietary supplements, sports nutrition, field hockey, female