Cited by 134Cardiovascular and exercise physiologyExercise and Physiological ResponsesNitric Oxide and Endothelin Effects

Dietary nitrate supplementation improves exercise performance and decreases blood pressure in COPD patients

Open access
Berry, Michael J., Justus, Nicholas W., Hauser, Jordan I., Case, Ashlee H., Helms, Christine C., Basu, Swati, Rogers, Zachary, Lewis, Marc T. +1 more·2015·Nitric Oxide

Abstract

Dietary nitrate (NO3(-)) supplementation via beetroot juice has been shown to increase the exercise capacity of younger and older adults. The purpose of this study was to investigate the effects of acute NO3(-) ingestion on the submaximal constant work rate exercise capacity of COPD patients. Fifteen patients were assigned in a randomized, single-blind, crossover design to receive one of two treatments (beetroot juice then placebo or placebo then beetroot juice). Submaximal constant work rate exercise time at 75% of the patient's maximal work capacity was the primary outcome. Secondary outcomes included plasma NO3(-) and nitrite (NO2(-)) levels, blood pressure, heart rate, oxygen consumption (VO2), dynamic hyperinflation, dyspnea and leg discomfort. Relative to placebo, beetroot ingestion increased plasma NO3(-) by 938% and NO2(-) by 379%. Median (+interquartile range) exercise time was significantly longer (p = 0.031) following the ingestion of beetroot versus placebo (375.0 + 257.0 vs. 346.2 + 148.0 s, respectively). Compared with placebo, beetroot ingestion significantly reduced iso-time (p = 0.001) and end exercise (p = 0.008) diastolic blood pressures by 6.4 and 5.6 mmHg, respectively. Resting systolic blood pressure was significantly reduced (p = 0.019) by 8.2 mmHg for the beetroot versus the placebo trial. No other variables were significantly different between the beetroot and placebo trials. These results indicate that acute dietary NO3(-) supplementation can elevate plasma NO3(-) and NO2(-) concentrations, improve exercise performance, and reduce blood pressure in COPD patients.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.niox.2014.10.007

Cites

58 of 58 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Dietary nitrate has been shown to improve exercise tolerance in chronic obstructive pulmonary disease (COPD) patients.

    “and in chronic obstructive pulmonary disease (COPD) patients (12).”

    From Dietary Nitrate and Physical Performance (2018) · cites this paper as [12]

  • Over 14 studies have confirmed reduced VO2 and increased work capacity in response to nitrate during submaximal exercise in healthy individuals and in certain chronic diseases.

    “an effect that over 14 studies have confirmed with reduced VO2 and increased work capacity in response to nitrate during submaximal exercise in healthy individuals[128,129] (reviewed in:[130,131]) and in certain chronic diseases[127,132].”
  • Recent human studies demonstrated that dietary nitrate (beetroot juice containing approximately 200-400 mg of nitrate) improved exercise performance and reduced blood pressure in COPD patients.

    “Recent human studies have demonstrated that dietary nitrate (beetroot juice containing approximately 200–400 mg of nitrate) improved the exercise performance and reduced blood pressure in COPD patients [130,131].”

    From NO-Rich Diet for Lifestyle-Related Diseases (2015) · cites this paper as [130]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Berry, M. J., Justus, N. W., Hauser, J. I., Case, A. H., Helms, C. C., Basu, S., Rogers, Z., Lewis, M. T., & Miller, G. D.
Affiliations
Wake Forest University (US)
Corresponding author
Berry, Michael J.
Venue
Nitric Oxide
Publisher
Elsevier BV
Published
2015-08
Volume
48
Pages
22-30
ISSN
1089-8603 (ISSN-L)
OpenAlex
W2082804715
Cited by
134
References
58
Citations by year
2026: 4 · 2025: 2 · 2024: 13 · 2023: 3 · 2022: 9 · 2021: 8 · 2020: 15 · 2019: 14 · 2018: 14 · 2017: 22 · 2016: 14 · 2015: 15 · 2014: 1
FWCI
37.30
Type
journal article
Language
en
Open access
Locations
  • Nitric Oxide (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Translational Science Center
  • National Institutes of Health Grant (NR011186)
Topics
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
Keywords
dietary nitrate, beetroot juice, chronic obstructive pulmonary disease, exercise capacity, blood pressure, plasma nitrate, plasma nitrite, submaximal exercise, dyspnea, oxygen consumption, heart rate
MeSH terms
Aged, Beverages, Blood Pressure, Dyspnea, Female, Heart Rate, Humans, Male, Middle Aged, Nitrates, Nitrites, Oxygen, Exercise, Treatment Outcome, Dietary Supplements, Beta vulgaris, Pulmonary Disease, Chronic Obstructive

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review