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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Oxygen Consumption Clear all
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 Jun 26, 2026, 10:04 PM EDT
Not yet recruiting 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 Jun 26, 2026, 10:04 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 Jun 26, 2026, 10:04 PM EDT
Not listed Phase 1 Interventional

Atrial Fibrillation: Chronic Beta-blocker Use Versus As-needed Rate Control Guided by Implantable Cardiac Monitor

NCT05745337
View directory record Official record
Conditions
Atrial Fibrillation, Diastolic Dysfunction, HFpEF - Heart Failure With Preserved Ejection Fraction
Interventions
As needed pharmacological rate control with beta-blocker (metoprolol tartrate, metoprolol succinate) or calcium channel blocker (diltiazem, verapamil)
Drug
Lead sponsor
University of Vermont
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Mar 2, 2023 · Synced Jun 26, 2026, 10:04 PM EDT
Completed Not applicable Interventional

DCS Study in Extremely Premature Newborns

NCT04367181
View directory record Official record
Conditions
Premature Birth, Extremely Low Birth Weight, Infant, Small for Gestational Age, Intracerebral Hemorrhage
Interventions
Diffuse Correlation Spectroscopy (DCS), Amplitude Integrated Electroencephalography (aEEG)
Device
Lead sponsor
Maria Angela Franceschini
Other
Eligibility
0 Hours to 72 Hours
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Jun 26, 2026, 10:04 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 Jun 26, 2026, 10:04 PM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Gas Kinetics and Metabolism in Anesthesia During Non Steady State

NCT00225381
View directory record Official record
Conditions
Anesthetized Healthy Patients (ASA 1 or 2) in the Supine Position, Excluding Head, Neck and Head Surgeries, Anesthetized Patient With Severe Systemic Disease (ASA 3 or 4)
Interventions
connection of measuring device to anesthesia circuit, drawing of blood sample through an arterial line, placed according to clinical criteria by primary anesthesia team, changing operating room bed position (head down and up position), adding PEEP during anesthesia, placement of esophageal Doppler for cardiac output measurements, Humidity sensor, A mixing chamber (bymixer), Pneumotachometer cuvette, Mass spectrometer sampling port
Device · Procedure
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2012
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Mar 22, 2021 · Synced Jun 26, 2026, 10:04 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 Jun 26, 2026, 10:04 PM EDT
Completed No phase listed Observational

PErfusioN, OxyGen ConsUmptIon and ENergetics in ADPKD (PENGUIN)

NCT04407481
View directory record Official record
Conditions
Polycystic Kidney Disease, Adult, Polycystic Kidney, Autosomal Dominant
Interventions
Aminohippurate Sodium Inj 20%, Iohexol Inj 300 milligrams per milliliter (MG/ML), PET/CT Scan
Drug · Radiation
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 40 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 2, 2023 · Synced Jun 26, 2026, 10:04 PM EDT
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 Jun 26, 2026, 10:04 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Lower Extremity Blood Flow Restriction Training on Power, and Muscle Size.

NCT03983070
View directory record Official record
Conditions
Healthy
Interventions
Seated Rowing Ergometer, Deadlift, Blood flow restriction
Other
Lead sponsor
Campbell University, Incorporated
Other
Eligibility
18 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Buies Creek, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 13, 2022 · Synced Jun 26, 2026, 10:04 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

BFR Training on a Bike to Augment RC Strength, Leg Strength, and VO2 Peak

NCT05344391
View directory record Official record
Conditions
Can BFR Cycling Augment Strength and VO2peak
Interventions
BFR cycling, Cycling without BFR
Other
Lead sponsor
George Fox University
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
2
States / cities
Newberg, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 24, 2022 · Synced Jun 26, 2026, 10:04 PM EDT
Terminated Phase 4 Interventional Results available

Physiologic Effects of RBC Transfusion

NCT02566577
View directory record Official record
Conditions
Red Blood Cell Transfusion
Interventions
Fresh red blood cell (RBC) transfusion, Storage-aged red blood cell (RBC) transfusion, Electronic infusion pump
Biological · Device
Lead sponsor
Emory University
Other
Eligibility
21 Years to 80 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated May 23, 2019 · Synced Jun 26, 2026, 10:04 PM EDT
Terminated Phase 2 Interventional Results available

Thiamine vs. Placebo to Increase Oxygen Consumption After Cardiac Arrest

NCT02974257
View directory record Official record
Conditions
Cardiac Arrest, Shock, Lactic Acidosis, Thiamin Deficiency
Interventions
Thiamine, placebo
Drug · Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 9, 2025 · Synced Jun 26, 2026, 10:04 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 Jun 26, 2026, 10:04 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 Jun 26, 2026, 10:04 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 Jun 26, 2026, 10:04 PM EDT
Terminated Phase 3 Interventional Results available

The Effect of Omega-3 Polyunsaturated Fatty Acids in Congestive Heart Failure

NCT00944229
View directory record Official record
Conditions
Heart Failure
Interventions
LOVAZA (Omega-3), Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 24, 2016 · Synced Jun 26, 2026, 10:04 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

O2 Consumption and Heart Rate Response to Battle Rope Exercise Protocol Versus UE Arm Bike Test in Adults With SCI

NCT03793595
View directory record Official record
Conditions
Spinal Cord Injury at T2 and Below
Interventions
Seated Battle Ropes Protocol, Seated Upper Extremity Arm Bike
Device
Lead sponsor
Texas Woman's University
Other
Eligibility
18 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 18, 2021 · Synced Jun 26, 2026, 10:04 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 Jun 26, 2026, 10:04 PM EDT
Recruiting Phase 1Phase 2 Interventional

Intermittent Hypoxia-initiated Plasticity in Humans: A Multi-pronged Therapeutic Approach to Treat Sleep Apnea and Overlapping Co-morbidities

NCT05558501
View directory record Official record
Conditions
Obstructive Sleep Apnea
Interventions
Mild Intermittent Hypoxia, Sham MIH
Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
30 Years to 60 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 3, 2025 · Synced Jun 26, 2026, 10:04 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Oxygen Uptake Kinetics During Recovery From Maximal and Submaximal Exercise

NCT00001519
View directory record Official record
Conditions
Healthy
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
Not listed
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1996 – 2001
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jun 26, 2026, 10:04 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Does the Relaxation Response Inhibit Acute Stress?

NCT00179595
View directory record Official record
Conditions
Healthy
Interventions
relaxation response- meditation
Behavioral
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 49 Years
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 15, 2017 · Synced Jun 26, 2026, 10:04 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 Jun 26, 2026, 10:04 PM EDT