Research Commons
      • Browse 
        • Communities & Collections
        • Titles
        • Authors
        • By Issue Date
        • Subjects
        • Types
        • Series
      • Help 
        • About
        • Collection Policy
        • OA Mandate Guidelines
        • Guidelines FAQ
        • Contact Us
      • My Account 
        • Sign In
        • Register
      View Item 
      •   Research Commons
      • University of Waikato Research
      • Education
      • Education Papers
      • View Item
      •   Research Commons
      • University of Waikato Research
      • Education
      • Education Papers
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      The effect of dietary nitrate supplementation on physiology and performance in trained cyclists

      McQuillan, Joseph A.; Dulson, Deborah K.; Laursen, Paul B.; Kilding, Andrew E.
      Thumbnail
      Files
      McQuillan et al 2016 The Effect of Dietary Nitrate Supplementation on Physiology and Performance in Trained Cyclists.pdf
      Accepted version, 440.7Kb
      DOI
       10.1123/ijspp.2016-0202
      Find in your library  
      Citation
      Export citation
      McQuillan, J. A., Dulson, D. K., Laursen, P. B., & Kilding, A. E. (2016). The effect of dietary nitrate supplementation on physiology and performance in trained cyclists. International Journal of Sports Physiology and Performance, 1–22. http://doi.org/10.1123/ijspp.2016-0202
      Permanent Research Commons link: https://hdl.handle.net/10289/10780
      Abstract
      Purpose: To determine the effect of dietary nitrate (NO₃⁻) supplementation on physiology and performance in well-trained cyclists following six to eight-days of NO₃⁻ supplementation. Methods: Eight competitive male cyclists (mean ± SD; age = 26 ± 8 y; body mass = 76.7 ± 6.9 kg; VO2peak = 63 ± 4 ml.kg⁻¹.min⁻¹) participated in a double-blind, placebo-controlled, crossover-design study in which participants ingested 70 ml beetroot juice containing ~4 mmol NO₃⁻ (NIT) or a NO₃⁻ depleted placebo (PLA) , each for 8-days. Replicating pre-treatment measures, participants undertook an incremental ramp assessment to determine VO₂peak, first (VT₁), and second (VT₂) ventilatory thresholds on day 6 (NIT6 and PLA6), moderate-intensity cycling economy on day 7 (NIT7 and PLA7), and a 4-km time-trial on day 8 (NIT8 and PLA8). Results: Relative to PLA, 6 days of NIT supplementation produced unclear effects for VO2peak (mean ±95%CL: 1.8 ±5.5%) and VT1 (3.7 ±12.3%) and trivial effects for both VT2 (-1.0 ±3.0%) and exercise economy on day 7 (-1.0 ±1.6%). However, effects for time-trial performance time (0.7 ±0.9%), and power (2.4 ±2.5%), on day 8 were likely beneficial. Conclusions: Despite mostly unclear outcomes for standard physiological determinants of performance, 8-days of NO₃⁻ supplementation resulted in likely beneficial improvements to 4-km time-trial performance in well trained male endurance cyclists.
      Date
      2016
      Type
      Journal Article
      Rights
      This is an author’s accepted version of an article published in the journal: International Journal of Sports Physiology and Performance. © 2016 Human Kinetics, Inc
      Collections
      • Education Papers [1316]
      Show full item record  

      Usage

      Downloads, last 12 months
      166
       
       
       

      Usage Statistics

      For this itemFor all of Research Commons

      The University of Waikato - Te Whare Wānanga o WaikatoFeedback and RequestsCopyright and Legal Statement