English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background  Nitrate supplementation is thought to improve performance in endurance sports.    Objective  To meta-analyze studies evaluating the effect of nitrate supplementation on endurance sports performance among adults.    Data sources  We searched the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE, Web of Science and CINAHL without language restrictions.    Methods  We included studies that: 1) compared nitrate supplementation with placebo; 2) enrolled adults engaging in an endurance-based activity; and 3) reported a performance measure or surrogate physiologic outcome. We evaluated risk of bias using the Cochrane Collaboration tool and pooled data with a random-effects model. We used the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach to evaluate confidence in estimates.    Results  We included 73 studies ( n  = 1061). Nitrate supplementation improved power output (MD 4.6 watts,  P  < 0.0001), time to exhaustion (MD 25.3 s,  P  < 0.00001), and distance travelled (MD 163.7 m,  P  = 0.03). We found no significant difference on perceived exertion, time trial performance and work done. Nitrate supplementation decreased VO 2  (MD − 0.04 L/min,  P  < 0.00001) but had no significant effect on VO 2max  or blood lactate levels.    Conclusion  The available evidence suggests that dietary nitrate supplementation benefits performance-related outcomes for endurance sports.    Supplementary Information  The online version contains supplementary material available at 10.1186/s12970-021-00450-4.

journal of the international society of sports nutrition

The effects of dietary nitrate supplementation on endurance exercise performance and cardiorespiratory measures in healthy adults: a systematic review and meta-analysis