Nitrates, Hockey
Conditions
Keywords
dietary supplements, sports nutrition, field hockey, female
Brief summary
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
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
Interventions
DIETARY_SUPPLEMENTBeetroot juice
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.
DIETARY_SUPPLEMENTBeetroot juice placebo
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.
Sponsors
University of Alcala
University of Seville
Universidad Francisco de Vitoria
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
FEMALE
Age
18 Years to 35 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Changes in simulated field hockey match demands (m/min) | 1 week | Using a global position system (GPS) |
| Changes in repeated-sprint-ability test (s) | 1 week | Time to complete the modified repeated sprint ability test using photocell timing gates |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Changes in sprint time (s) | 1 week | Time to complete 20-m sprints using photocell timing gates |
| Changes in maximal jump height (cm) | 1 week | Maximal jump height using a contact platform |
| Changes in maximal isometric handgrip strength (N) | 1 week | Using a hand-held dynamometer |
Countries
Spain
Outcome results
None listed