We have located links that may give you full text access.
Physiological and performance effects of nitrate supplementation during roller-skiing in normoxia and normobaric hypoxia.
Nitric Oxide : Biology and Chemistry 2017 November 2
The present study examined the effects of acute nitrate (NO3 - ) supplementation ingested in the form of concentrated beetroot juice on cross-country roller-ski performance in normoxia (N) and normobaric hypoxia (H). Eight competitive cross-country skiers (five males: age 22 ± 3 years, V·O2max 71.5 ± 4.7 mL kg-1 ·min-1 ; three females: age 21 ± 1 years, V·O2max 58.4 ± 2.5 mL kg-1 ·min-1 ) were supplemented with a single dose of NO3 - -rich beetroot juice (BRJ, ∼13 mmol NO3 - ) or a NO3 - -depleted placebo (PL, ∼0 mmol NO3 - ) and performed 2 x 6-min submaximal exercise bouts and a 1000-m time-trial (TT) on a treadmill in N (20.9% O2 ) or H (16.8% O2 ). The four experimental trials were presented in a randomised, counter-balanced order. Plasma NO3 - and nitrite concentrations were significantly higher following BRJ compared to PL (both p < 0.001). However, respiratory variables, heart rate, blood lactate concentration, ratings of perceived exertion, and near-infrared spectroscopy-derived measures of muscle tissue oxygenation during submaximal exercise were not significantly different between BRJ and PL (all p > 0.05). Likewise, time to complete the TT was unaffected by supplementation in both N and H (p > 0.05). In conclusion, an acute dose of ∼13 mmol NO3 - does not affect physiological or performance responses to submaximal or maximal treadmill roller-skiing in competitive cross-country skiers exercising in N and H.
Full text links
Related Resources
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app