Sökning: onr:"swepub:oai:DiVA.org:miun-31384" >
Physiological and p...
Physiological and performance effects of nitrate supplementation during roller-skiing in normoxia and normobaric hypoxia
-
- Nybäck, Linn (författare)
- Mittuniversitetet,Avdelningen för hälsovetenskap
-
- Glännerud, Caroline (författare)
- Mittuniversitetet,Avdelningen för hälsovetenskap
-
- Larsson, Gustav (författare)
- Mittuniversitetet,Avdelningen för hälsovetenskap
-
visa fler...
-
- Weitzberg, Eddie (författare)
- Karolinska Institutet
-
- Shannon, Oliver (författare)
- Leeds Beckett University, UK
-
- McGawley, Kerry, 1978- (författare)
- Mittuniversitetet,Avdelningen för hälsovetenskap,Swedish Winter Sports Research Centre
-
visa färre...
-
(creator_code:org_t)
- Elsevier BV, 2017
- 2017
- Engelska.
-
Ingår i: Nitric oxide. - : Elsevier BV. - 1089-8603 .- 1089-8611. ; 70, s. 1-8
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
http://kipublication...
-
visa färre...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)
Nyckelord
- Beetroot juice
- Endurance exercise
- Simulated altitude
- Work economy
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas