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The effect of six days of dietary nitrate supplementation on performance in trained CrossFit athletes

Title: The Effect Of Six Days Of Dietary Nitrate Supplementation On Performance In Trained Crossfit Athletes.
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Name(s): Kramer, Samuel J., author
Baur, Daniel A., author
Spicer, Maria T., author
Vukovich, Matthew D., author
Ormsbee, Michael J., author
Type of Resource: text
Genre: Text
Date Issued: 2016-11-03
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: 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.
Identifier: FSU_libsubv1_wos_000387076700001 (IID), 10.1186/s12970-016-0150-y (DOI)
Keywords: Anaerobic power, Beetroot, extension, intensity exercise, moderate-intensity, muscle, oxygen-consumption, Potassium nitrate, power, Reliability, rich beetroot juice, Rowing, rowing performance, Supplementation, time-trial performance
Publication Note: The publisher’s version of record is available at https://doi.org/10.1186/s12970-016-0150-y
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000387076700001
Owner Institution: FSU
Is Part Of: Journal of the International Society of Sports Nutrition.
1550-2783
Issue: vol. 13

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Kramer, S. J., Baur, D. A., Spicer, M. T., Vukovich, M. D., & Ormsbee, M. J. (2016). The Effect Of Six Days Of Dietary Nitrate Supplementation On Performance In Trained Crossfit Athletes. Journal Of The International Society Of Sports Nutrition. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000387076700001