It has been reported that nitrate supplementation can improve exercise performance. Most of the studies have used either beetroot juice or sodium nitrate as a supplement; there is lack of data on the potential ergogenic benefits of an increased dietary nitrate intake from a diet based on fruits and vegetables. Our aim was to assess whether a high-nitrate diet increases nitric oxide bioavailability and to evaluate the effects of this nutritional intervention on exercise performance. Seven healthy male subjects participated in a randomized cross-over study. They were tested before and after 6 days of a high (HND) or control (CD) nitrate diet (~8.2 mmol∙day(-1) or ~2.9 mmol∙day(-1), respectively). Plasma nitrate and nitrite concentrations were significantly higher in HND (127 ± 64 µM and 350 ± 120 nM, respectively) compared to CD (23 ± 10 µM and 240 ± 100 nM, respectively). In HND (vs. CD) were observed: (a) a significant reduction of oxygen consumption during moderate-intensity constant work-rate cycling exercise (1.178 ± 0.141 vs. 1.269 ± 0.136 L·min(-1)); (b) a significantly higher total muscle work during fatiguing, intermittent sub-maximal isometric knee extension (357.3 ± 176.1 vs. 253.6 ± 149.0 Nm·s·kg(-1)); (c) an improved performance in Repeated Sprint Ability test. These findings suggest that a high-nitrate diet could be a feasible and effective strategy to improve exercise performance.
Effects of a short-term high-nitrate diet on exercise performance / S. Porcelli, L. Pugliese, E. Rejc, G. Pavei, M. Bonato, M. Montorsi, A. La Torre, L. Rasica, M. Marzorati. - In: NUTRIENTS. - ISSN 2072-6643. - 8:9(2016 Aug), pp. 534.1-534.12.
|Titolo:||Effects of a short-term high-nitrate diet on exercise performance|
PORCELLI, SIMONE (Primo)
PUGLIESE, LORENZO (Secondo)
RASICA, LETIZIA (Penultimo)
|Parole Chiave:||diet; intermittent high-intensity exercise; nitric oxide; oxygen cost of exercise|
|Settore Scientifico Disciplinare:||Settore M-EDF/02 - Metodi e Didattiche delle Attivita' Sportive|
|Data di pubblicazione:||ago-2016|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3390/nu8090534|
|Appare nelle tipologie:||01 - Articolo su periodico|