Aerobic Fitness Affects the Exercise Performance Responses to Nitrate Supplementation. (Articolo in rivista)

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  • Aerobic Fitness Affects the Exercise Performance Responses to Nitrate Supplementation. (Articolo in rivista) (literal)
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  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1249/MSS.0000000000000577 (literal)
Alternative label
  • Simone Porcelli1, Matthew Ramaglia1, Giuseppe Bellistri1-2, Gaspare Pavei3, Lorenzo Pugliese2, Michela Montorsi1,4, Letizia Rasica1, and Mauro Marzorati1 (2014)
    Aerobic Fitness Affects the Exercise Performance Responses to Nitrate Supplementation.
    in Medicine and science in sports and exercise (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Simone Porcelli1, Matthew Ramaglia1, Giuseppe Bellistri1-2, Gaspare Pavei3, Lorenzo Pugliese2, Michela Montorsi1,4, Letizia Rasica1, and Mauro Marzorati1 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • Pubblicato on-line: 19 Novembre 2014 (literal)
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  • PubMe (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Institute of Molecular Bioimaging and Physiology, National Research Council, Segrate, Italy 2. Department of Biomedical Sciences for Health, University of Milan, Milano, Italy 3. Department of Pathophysiology and Transplantation, University of Milan, Milano, Italy 4. Telematic University S. Raffaele Roma, Milano, Italy (literal)
Titolo
  • Aerobic Fitness Affects the Exercise Performance Responses to Nitrate Supplementation. (literal)
Abstract
  • PURPOSE: Dietary nitrate supplementation has been shown to reduce O2 cost of submaximal exercise, improve exercise tolerance and enhance performance in moderately trained individuals. In contrast, data have been provided that elite athletes do not benefit from nitrate supplementation. The aim of this study was to evaluate the effects of short-term nitrate supplementation on endurance performance in subjects with different level of aerobic fitness. METHODS: Twenty-one subjects (age 22.7±1.8 years) with different aerobic fitness level (V?O2peak value ranging from 28.2 to 81.7 ml· kg· min) participated in a crossover double-blind placebo-controlled study. Subjects were tested after 6 days of supplementation with either 0.5 l per day of nitrate (5.5 mmol) containing water (NITR) or nitrate-free water (PLA). Participants performed an incremental running test until exhaustion and four repetitions of 6-min sub-maximal (about 80% of gas exchange threshold) constant load exercise on a motorized treadmill. Moreover, subjects performed a 3-km running Time Trial on the field. RESULTS: After NITR, a negative correlation between reduction of O2 cost of submaximal exercise and individual aerobic fitness level was observed (r=0.80; p<0.0001). A significant inverse correlation was also found between aerobic fitness level and improvement in performance for 3-km Time Trial after NITR (r=0.76; p<0.0001). Additionally, subjects responded differently to dietary nitrate supplementation according to aerobic fitness level with higher fit subjects showing a lower increase in plasma [NO3] (r=0.86; p<0.0001) and [NO2] (r=0.75; p<0.0001). CONCLUSIONS: The results of the present study suggest that the individual aerobic fitness level affects the ergogenic benefits induced by dietary nitrate supplementation. The optimal nitrate loading regimen required to elevate plasma [NO2] and to enhance performance in elite athletes is different from that of low fit subjects and requires further studies. (literal)
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