The Effects of Nitrate Supplementation on Elite Runners

Not Applicable

Completed

• Conditions: Nutrition; Nitrates; Sport Physiology; Physical Performance; Elite Athletes
• Interventions: Dietary Supplement: nitrate-rich beetroot juice; Dietary Supplement: Placebo

• Registration Number: NCT03449992
• Lead Sponsor: Universidad Autonoma de Madrid

Brief Summary

This study analyzed the effects of 15 days of beetroot juice supplementation on different performance measures in elite Spanish distance runners

Detailed Description

This study analyzed the effects of 15 days beetroot juice supplementation on the VO2max, running economy, exercise perceived exertion, muscle power and locomotion mechanics in a group of 12 elite Spanish middle and long distance runners

Study Timeline

• Study Start: 2016-11-01
• Primary Completion: 2017-01-10
• Study Completion: 2017-11-15
• Status Verified: 2018-02
• Study First Submitted: 2018-02-19
• Study First Submitted QC: 2018-02-22
• Last Update Submitted: 2018-02-22
• Study First Posted: 2018-03-01
• Last Update Posted: 2018-03-01

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 12

Inclusion Criteria

• Competing in national and international events
• Personal best in urban 10k: 33 minutes 0 seconds

Exclusion Criteria

• Injury

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Intervention group	nitrate-rich beetroot juice	Participants in this group ingested nitrate-rich beetroot juice for 15 days
Placebo group	Placebo	Participants in this group ingested a placebo drink for 15 days

Primary Outcome Measures

Name	Time	Method
Running economy	Changes from baseline at 15 days	The cost of running (oxygen consumption) at different speeds

Secondary Outcome Measures

Name	Time	Method
Time to exhaustion	Changes from baseline at 15 days	Time that the athlete endured running until voluntarily ending the exercise
Muscle power	Changes from baseline at 15 days	Ability to produce muscle power in a jump test
Muscle oxygenation	Changes from baseline at 15 days	Saturation of O2 in the vastus lateralis during exercise
RPE	Changes from baseline at 15 days	Rate of perceived exertion during the exercise
Running mechanics	Changes from baseline at 15 days	Contact and flight time of each step during the exercise