Document Type
Article
Publication Date
2016
Keywords
Potassium nitrate, Rowing, Supplementation, Beetroot, Anaerobic power
Abstract
Background: While it is well established that dietary nitrate reduces the metabolic cost of exercise, recent evidence suggests this effect is maintained 24 h following the final nitrate dose when plasma nitrite levels have returned to baseline. In addition, acute dietary nitrate was recently reported to enhance peak power production. Our purpose was to examine whether chronic dietary nitrate supplementation enhanced peak power 24 h following the final dose and if this impacted performance in a heavily power-dependent sport.
Methods: In a double-blind, randomized, crossover design, maximal aerobic capacity, body composition, strength, maximal power (30 s Wingate), endurance (2 km rowing time trial), and CrossFit performance (Grace protocol) were assessed before and after six days of supplementation with nitrate (NO) (8 mmol·potassium nitrate·d−1) or a noncaloric placebo (PL). A 10-day washout period divided treatment conditions. Paired t-tests were utilized to assess changes over time and to compare changes between treatments.
Results: Peak Wingate power increased significantly over time with NO (889.17 ± 179.69 W to 948.08 ± 186.80 W; p = 0.01) but not PL (898.08 ± 183.24 W to 905.00 ± 157.23 W; p = 0.75). However, CrossFit performance was unchanged, and there were no changes in any other performance parameters.
Conclusion: Consuming dietary nitrate in the potassium nitrate salt form improved peak power during a Wingate test, but did not improve elements of strength or endurance in male CrossFit athletes.
Publication Title
Journal of the International Society of Sports Nutrition
Volume
13
Issue
39
Type
text
Format
application/pdf
Language
en
DOI of Published Version
10.1186/s12970-016-0150-y
Publisher
BioMed Central
Rights
In Copyright - Non-Commercial Use Permitted
http://rightsstatements.org/vocab/InC-NC/1.0/
Recommended Citation
Kramer, Samuel J.; Baur, Daniel A.; Spicer, Maria T.; and Vukovich, Matthew D., "The Effect of Six Days of Dietary Nitrate Supplementation on Performance in Trained CrossFit Athletes" (2016). Health and Nutritional Sciences Faculty Publications. 1.
https://openprairie.sdstate.edu/hns_pubs/1
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
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