Evidence map›Paper›PMID 42028867›Full record

ReviewThe Journal of physiology2026

Exercise in acute and subacute hypoxic conditions: physiological responses affecting oxygen delivery and their applications to human health.

Lindsay M Forbes, Christopher M Hearon, Justin Cillay, Justin S Lawley, Michael Stembridge, Andrew W Subudhi, Benjamin D Levine, William K Cornwell

Abstract readReview
In one paragraph

Review in The Journal of physiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Lindsay M ForbesDivision of Pulmonary, Allergy and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
Christopher M HearonTexas Health Presbyterian Hospital, Institute for Exercise and Environmental Medicine, Dallas, Texas, USA.
Justin CillayDivision of Pulmonary, Allergy and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
Justin S LawleyDepartment of Sport Science, University of Innsbruck, Innsbruck, Austria.
Michael StembridgeCardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK.
Andrew W SubudhiDepartment of Human Physiology and Nutrition, University of Colorado, Colorado Springs, Colorado, USA.
Benjamin D LevineTexas Health Presbyterian Hospital, Institute for Exercise and Environmental Medicine, Dallas, Texas, USA.
William K CornwellClinical Translational Research Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.

Funding

Right Ventricular Response to Exercise Among Patients with Chronic Obstructive Pulmonary DiseaseK23HL175186 · NHLBI · UNIVERSITY OF COLORADO DENVER · PI Lindsay M Forbes · 2025 to 2026
$382k
NHLBI NIH HHS K23 HL175186NHLBI NIH HHS K23HL175186NIH
6 · The paper itself

Abstract

Exercise at altitude is performed by a spectrum of individuals ranging from healthy to those with cardiovascular and pulmonary diseases. Reduced atmospheric oxygen pressure at increased altitude reduces oxygen availability and poses unique challenges during exercise. This review explores the physiological responses to exercise under acute and subacute exposure to hypoxia within the autonomic, pulmonary, cardiovascular and haematologic systems. In response to acutely reduced arterial pressure of oxygen, peripheral chemoreceptors stimulate centrally mediated reflexes including the hypoxic ventilatory response and increase sympathetic nerve-mediated activity to the peripheral vasculature and skeletal muscle. Additionally, reduced pressure of oxygen in the pulmonary alveoli and kidneys stimulate hypoxic pulmonary vasoconstriction and erythropoiesis, respectively. During acute hypoxic exercise, heart rate and minute ventilation are greater for any given workload, and maximal oxygen consumption is progressively reduced with increasing altitude. For individuals with cardiovascular and/or pulmonary diseases, exertional hypoxaemia and constraints related to the hypoxic ventilatory response and hypoxic pulmonary vasoconstriction further limit exercise at altitude and increase the risk of adverse events. Exercise in acute hypoxic conditions has been evaluated in patients with stable, mild-to-moderate cardiovascular and/or pulmonary diseases, where it is associated with anticipated decrements in exercise performance but appears to be largely tolerated. However, further study is required to counsel patients across a spectrum of disease severity. Finally, hypoxic exercise has been investigated in limited settings as a therapeutic intervention, including for overweight/obesity, right ventricular remodelling and ageing, but further research is needed to determine the potential roles for hypoxic exercise as therapy.

Indexed as

altitudecardiovascular physiologyexerciseexercise physiologyhigh altitudehypoxiapulmonary hypoxic vasoconstriction

Identifiers

PMID42028867
PMCPMC13120727

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.