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Open AccessArticle

Nitrate Supplementation Combined with a Running Training Program Improved Time-Trial Performance in Recreationally Trained Runners

1
Department of Physical Education, University São Judas Tadeu, São Paulo, SP 05503-001, Brazil
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Immunometabolism of Skeletal Muscle and Exercise Research Group, Department of Physical Education, Federal University of Piauí (UFPI), Teresina, PI 64049-550, Brazil
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Associate Graduate Program in Health Science, Federal University of Piauí (UFPI), Teresina, PI 64049-550, Brazil
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School of Physical Education, University of Campinas (Unicamp), Campinas, SP 13.083-051, Brazil
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Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo (USP), São Paulo, SP 05508-010, Brazil
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Department of Research and Extension, Igesp Health Sciences College (Fasig), São Paulo, SP 01301-000, Brazil
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Département de kinésiologie, Université Laval, Québec, QC G3C 0S6, Canada
8
Exercise and Immunometabolism Research Group, Department of Physical Education, São Paulo State University (UNESP), Presidente Prudente, SP 19060-900, Brazil
*
Author to whom correspondence should be addressed.
Sports 2019, 7(5), 120; https://doi.org/10.3390/sports7050120
Received: 15 April 2019 / Revised: 10 May 2019 / Accepted: 16 May 2019 / Published: 21 May 2019
Our purpose was to verify the effects of inorganic nitrate combined to a short training program on 10-km running time-trial (TT) performance, maximum and average power on a Wingate test, and lactate concentration ([La]) in recreational runners. Sixteen healthy participants were divided randomly into two groups: Nitrate (n = 8) and placebo (n = 8). The experimental group ingested 750 mg/day (~12 mmol) of nitrate plus 5 g of resistant starch, and the control group ingested 6 g of resistant starch, for 30 days. All variables were assessed at baseline and weekly over 30 days. Training took place 3x/week. The time on a 10-km TT decreased significantly (p < 0.001) in all timepoints compared to baseline in both groups, but only the nitrate group was faster in week 2 compared to 1. There was a significant group × time interaction (p < 0.001) with lower [La] in the nitrate group at week 2 (p = 0.032), week 3 (p = 0.002), and week 4 (p = 0.003). There was a significant group time interaction (p = 0.028) for Wingate average power and a main effect of time for maximum power (p < 0.001) and [La] for the 60-s Wingate test. In conclusion, nitrate ingestion during a four-week running program improved 10-km TT performance and kept blood [La] steady when compared to placebo in recreational runners. View Full-Text
Keywords: sport nutrition; endurance training; performance; nitrate sport nutrition; endurance training; performance; nitrate
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Santana, J.; Madureira, D.; de França, E.; Rossi, F.; Rodrigues, B.; Fukushima, A.; Billaut, F.; Lira, F.; Caperuto, E. Nitrate Supplementation Combined with a Running Training Program Improved Time-Trial Performance in Recreationally Trained Runners. Sports 2019, 7, 120.

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