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Showing 1–24 of 54 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Oxygen Consumption Clear all
Not listed Not applicable Interventional Accepts healthy volunteers

Effects of Neo40(TM) With Caffeine on Cycling Time Trial Performance

NCT01710761
View directory record Official record
Conditions
Healthy
Interventions
Placebo, Nitrate supplement with caffeine
Dietary Supplement
Lead sponsor
University of Texas at Austin
Other
Eligibility
21 Years to 49 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jan 22, 2013 · Synced Sep 3, 2026, 7:37 PM EDT
Recruiting Phase 2 Interventional

Exercise Training and NR Supplementation Trial to Improve Fitness in AYA HCT Survivors

NCT05194397
View directory record Official record
Conditions
Lymphoblastic Leukemia, Cancer Survivors, Aplastic Anemia, Myelodysplastic Syndromes, Myeloid Leukemia
Interventions
Nicotinamide Riboside, Placebo, Exercise Intervention
Dietary Supplement · Other
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
10 Years to 30 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
3
States / cities
Duarte, California • Philadelphia, Pennsylvania • Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 3, 2025 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Passive Heat Therapy on Oxygen Consumption and Cardiovascular Fitness in Adults

NCT04026126
View directory record Official record
Conditions
Heart Failure, Heart Diseases, Cardiovascular Diseases, Endothelial Dysfunction
Interventions
Heat Therapy Treatment
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
50 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Oct 16, 2022 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Not applicable Interventional

Cardiopulmonary Rehabilitation for Adolescents and Adults With Congenital Heart Disease

NCT01822769
View directory record Official record
Conditions
Congenital Heart Disease, Heart Defects, Congenital
Interventions
Cardiopulmonary rehabilitation, Standard of care
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
16 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 24, 2018 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

VO2 Max: In Vivo Model for Functional Red Cell Testing. Can RECESS be Explained?

NCT02918851
View directory record Official record
Conditions
Healthy
Interventions
Transfusion of 7-day stored red blood cells, Transfusion of 28-day stored red blood cells, Transfusion of 42-day stored red blood cells
Biological
Lead sponsor
Stony Brook University
Other
Eligibility
18 Years to 40 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Stony Brook, New York
Source: ClinicalTrials.gov public record
Updated Apr 7, 2021 · Synced Sep 3, 2026, 7:37 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Rejuvenated RBC and VO2 Max in Healthy Subjects

NCT03089047
View directory record Official record
Conditions
Erythrocyte Transfusion
Interventions
Transfusion of rejuvenated and washed autolgous RBCs, Transfusion of washed autolgous RBCs
Biological
Lead sponsor
Duke University
Other
Eligibility
18 Years to 40 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 10, 2021 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Supplemental Oxygen on Maximal Oxygen Consumption in Patients With Chronic Obstructive Pulmonary Disease

NCT01294033
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Fractional inspired oxygen (FiO2) 0.21, Fractional inspired oxygen 0.28
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 15, 2017 · Synced Sep 3, 2026, 7:37 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Short-term Effects of Caffeine and a Multi-ingredient Pre-workout on Exercise Performance

NCT07024940
View directory record Official record
Conditions
Coffee, Anthocyanins, Exercise Performance
Interventions
Ethiopian Coffee, Supplement, Water (Placebo)
Other · Dietary Supplement
Lead sponsor
St. Louis University
Other
Eligibility
18 Years to 35 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 18, 2025 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

High Speed Circuit Training and Cognition

NCT04022707
View directory record Official record
Conditions
Educational Control, Resistance Training
Interventions
High-speed circuit resistance training, Educational control
Other
Lead sponsor
University of Miami
Other
Eligibility
60 Years to 85 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
2
States / cities
Coral Gables, Florida
Source: ClinicalTrials.gov public record
Updated May 17, 2020 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Phase 2 Interventional Results available

Thiamine as Adjunctive Therapy for Diabetic Ketoacidosis

NCT03717896
View directory record Official record
Conditions
Diabetic Ketoacidosis
Interventions
200mg IV thiamine in 50mL 0.9% saline, Placebo
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Dietary Nitrate for Heart Failure

NCT01682356
View directory record Official record
Conditions
Heart Failure, Hypertension, Pulmonary
Interventions
Beetroot juice
Dietary Supplement
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2023
U.S. locations
2
States / cities
Indianapolis, Indiana • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 3, 2024 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Pharmacokinetic/Pharmacodynamic Study of Udenafil in Adolescents

NCT02201342
View directory record Official record
Conditions
Single Ventricle Heart Disease After Fontan Surgery
Interventions
Udenafil
Drug
Lead sponsor
Mezzion Pharma Co. Ltd
Industry
Eligibility
14 Years to 18 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
5
States / cities
Indianapolis, Indiana • Ann Arbor, Michigan • Cincinnati, Ohio + 2 more
Source: ClinicalTrials.gov public record
Updated May 5, 2025 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Not applicable Interventional Results available

Oxygen Consumption-based Assessments of Hemodynamics in Neonates Following Congenital Heart Surgery (Oxy-CAHN Study)

NCT02184169
View directory record Official record
Conditions
Transposition of the Great Vessels, Hypoplastic Left Heart Syndrome, Oxygen Consumption Based Assessment of Hemodynamics
Interventions
General Electric Healthcare E-COVX Gas Monitoring Module for VO2 Measurments, Edwards Continuous SVO2 Catheter and Monitoring System - 4.5 fr
Device
Lead sponsor
Boston Children's Hospital
Other
Eligibility
1 Day to 6 Months
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 3, 2020 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Not applicable Interventional Results available

Effect of Thiamine on Oxygen Utilization (VO2) in Critical Illness

NCT01462279
View directory record Official record
Conditions
Acute Respiratory Failure
Interventions
Thiamine
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 15, 2018 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Phase 3 Interventional Results available

24 Hour Ambulatory Cardiac Oxygen Consumption

NCT05170061
View directory record Official record
Conditions
Hypertension
Interventions
Nebivolol, Valsartan, Nebivolol/valsartan combination
Drug
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 7, 2025 · Synced Sep 3, 2026, 7:37 PM EDT
Completed Phase 3 Interventional Results available

Fontan Udenafil Exercise Longitudinal Assessment Trial

NCT02741115
View directory record Official record
Conditions
Single Ventricle Heart Disease
Interventions
Udenafil, Placebo
Drug
Lead sponsor
Mezzion Pharma Co. Ltd
Industry
Eligibility
12 Years to 18 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
26
States / cities
Phoenix, Arizona • Los Angeles, California • San Diego, California + 22 more
Source: ClinicalTrials.gov public record
Updated Jun 16, 2025 · Synced Sep 3, 2026, 7:37 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Control of Renal Oxygen Consumption, Mitochondrial Dysfunction, and Insulin Resistance

NCT04074668
View directory record Official record
Conditions
Diabetic Kidney Disease, Type 1 Diabetes, Diabetes, Diabetes Mellitus, Diabetes Complications, Diabetic Nephropathies, Type1diabetes, Diabetes, Autoimmune, Autoimmune Diabetes, Juvenile Diabetes, Type 1 Diabetes Mellitus
Interventions
Aminohippurate Sodium Inj 20%, Iohexol Inj 300 milligrams/milliliter (mg/ml), PET/CT Scan, Renal Biopsy
Drug · Radiation · Procedure
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 30 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 8, 2023 · Synced Sep 3, 2026, 7:37 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Leggings With Resistance Bands on Caloric Expenditure During Exercise

NCT06547060
View directory record Official record
Conditions
Health Behavior
Interventions
Exercise leggings
Other
Lead sponsor
University of Texas at Austin
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Aug 8, 2024 · Synced Sep 3, 2026, 7:37 PM EDT
Terminated Phase 2 Interventional Results available

Phase II Study of the Effect of CK-1827452 Injection on Myocardial Efficiency

NCT00748579
View directory record Official record
Conditions
Heart Failure
Interventions
CK-1827452
Drug
Lead sponsor
Cytokinetics
Industry
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
2
States / cities
Baltimore, Maryland • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 20, 2020 · Synced Sep 3, 2026, 7:37 PM EDT
Terminated Phase 4 Interventional Results available

The Combination Ambrisentan Plus Spironolactone in Pulmonary Arterial Hypertension Study

NCT02253394
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Ambrisentan plus Spironolactone, Ambrisentan plus Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 14, 2019 · Synced Sep 3, 2026, 7:37 PM EDT
Completed No phase listed Observational

Tissue Oxygen Use With Combined Arteriovenous Noninvasive Oximetry

NCT06072755
View directory record Official record
Conditions
Oxygen Consumption
Interventions
Finger pulse oximetry probe, Transreflectance oximetry probe
Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 22, 2024 · Synced Sep 3, 2026, 7:37 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Cerebrovascular and Cognitive Improvement by Resveratrol (resVida) and Fruitflow-II (CCIRF-II)

NCT01766180
View directory record Official record
Conditions
Memory Impairment
Interventions
Fruitflow-II, resVida
Drug
Lead sponsor
Neurolgy Institute for Brain Health and Fitness
Other
Eligibility
50 Years to 80 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Lutherville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 20, 2015 · Synced Sep 3, 2026, 7:37 PM EDT
Active, not recruiting Not applicable Interventional

Renal Oxygen Consumption, Insulin Sensitivity, and Daily Caloric Restriction in ADPKD

NCT06496542
View directory record Official record
Conditions
Autosomal Dominant Polycystic Kidney
Interventions
Daily caloric restriction, Standard advice control
Behavioral · Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 65 Years
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Sep 3, 2026, 7:37 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Comparison of Maximal Oxygen Uptake Obtained Via Seismofit and Cardiopulmonary Exercise Test

NCT07554404
View directory record Official record
Conditions
Healthy
Interventions
VO2 Max
Other
Lead sponsor
Salisbury University
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Salisbury, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 27, 2026 · Synced Sep 3, 2026, 7:37 PM EDT