ClinicalTrials.gg
CompletedNCT04026425Updated Jul 7, 2023

Analysis of Post-exertional Malaise Using a Two-day CPET in People With ME/CFS

An interventional study of Two-day cardiopulmonary exercise test in Myalgic Encephalomyelitis and Chronic Fatigue Syndrome, sponsored by Ithaca College. Completed at 3 sites in United States. Open to participants aged 18 Years to 70 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-07-07.

Sponsored by Ithaca College · Not applicable, Interventional, and Basic science

From the registry’s dates

  • Registered 11 months after the study started (first participant enrolled Aug 2018, registered Jul 2019).

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Phase
Not applicable
Study type
Interventional
Enrollment
173
Allocation
Non-randomized
Ages
18 Years to 70 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 86 studies in Fatigue Syndrome, Chronic with a site in United States — 21 open to participants now, 24 under way, none of them phase 3. Fatigue Syndrome, Chronic · United States.

Enrollment
6th of 58
173 · median 50
Started
2018
with 1 other
No phase
30 of 86
6 open now
Registered
48th of 86
by date

Among the 86 studies in Fatigue Syndrome, Chronic with a site in United States, this one is the 6th largest by enrollment of the 58 interventional ones that give a count, is one of 2 that started in 2018, is one of 30 with no phase, and was the 48th registered.

Fatigue Syndrome, Chronic

264 studies on the registry are indexed under Fatigue Syndrome, Chronic; 62 are open to participants now.

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Open to participants now

21 of the 86 studies in Fatigue Syndrome, Chronic with a site in United States are open now. Recruiting first, the newest first:

16 more — sign in →

All 21 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 44 Fatigue Syndrome, Chronic studies recruiting now, 18 (41%) set no upper age limit and 20 (45%) stop at 75 or younger; 5 take children under 18; 10 take healthy volunteers.

This study: 18 Years to 70 Years · all sexes · healthy volunteers too.

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02

Study summary

This study aims to collect and identify key outcome measures or disease parameters in ME/CFS that are altered during elevated symptoms relative to baseline by gathering information before and after symptom provocation using a two-day cardiopulmonary exercise test.

Read the detailed description

The phenomenon of post-exertional malaise (PEM), in which an ME/CFS patient's symptoms are elevated following even low-level exertion, is a hallmark feature of the disease. The cause of PEM, like the cause of ME/CFS, is not understood. This study aims to utilize a two-day CPET to invoke PEM. This provides a unique opportunity to collect data on how key outcome measures or disease parameters are altered during elevated symptoms relative to baseline within each patient by gathering information before and after symptom provocation.

A total of 90 participants and 90 controls will undergo CPET testing. Participation will be split amongst three different sites (Ithaca, NY, New York, NY, and Los Angeles, CA). Subjects will be located in urban and rural areas to establish relatively diverse study populations.

This study is a component of the Cornell ME/CFS Collaborative Research Center (CRC). Blood samples taken before and after CPET will be utilized in associated projects with the Cornell ME/CFS CRC. CPET data along with the analysis of blood samples has great potential to reveal why exercise negatively affects ME/CFS patients and thus perhaps why patients are also impaired even before increasing their activity level.

03

Conditions studied

  • Myalgic Encephalomyelitis
  • Chronic Fatigue Syndrome

Keywords

  • cardiopulmonary exercise test (CPET)
  • post-exertional malaise (PEM)
04

Who can participate

Ages eligible
18 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Eligibility criteria

Adults with ME/CFS:

Inclusion Criteria:

  • Diagnosed with ME/CFS
  • Adults 18 to 70 years of age

Exclusion Criteria:

  • Recent history of panic attacks within the past 6 months
  • Diagnosis of schizophrenia, major depressive disorder, bipolar disorder, or an anxiety disorder such as OCD or PTSD
  • Hospitalized for a psychological condition within the last 6 months
  • Unwilling to stop taking nutritional supplements, including probiotics, two weeks before the exercise tests.
  • Unwilling to stop pain medication and stimulant medication two days before the exercise tests.
  • Smoker, or stopped smoking less than 1 year ago
  • Pregnant or breastfeeding
  • Diabetic
  • Have an orthopedic limitation that prohibits cycle exercise
  • Excessive alcohol consumption

Healthy Volunteers:

Inclusion Criteria:

  • Healthy
  • Low-active
  • Adults 18 to 70 years of age

Exclusion Criteria:

  • Recent history of panic attacks within the past 6 months
  • Diagnosis of schizophrenia, major depressive disorder, bipolar disorder, or an anxiety disorder such as OCD or PTSD
  • Hospitalized for a psychological condition within the last 6 months
  • Unwilling to stop taking nutritional supplements, including probiotics, two weeks before the exercise tests.
  • Unwilling to stop pain medication and stimulant medication two days before the exercise tests.
  • Smoker, or stopped smoking less than 1 year ago
  • Pregnant or breastfeeding
  • Diabetic
  • Have an orthopedic limitation that prohibits cycle exercise
  • Excessive alcohol consumption
05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
173 participants (actual)

Study arms

  • Experimental
    ME/CFS

    Adults with ME/CFS

    Other: Two-day cardiopulmonary exercise test

  • Active comparator
    Healthy controls

    Healthy, low-active adults

    Other: Two-day cardiopulmonary exercise test

Interventions

  • OtherTwo-day cardiopulmonary exercise test

    A series of two cardiopulmonary exercise tests (CPETs) performed over two days. Participants will perform a CPET and then will return approximately 24 hours later to perform the second CPET. The CPET begins with 3 minutes of seated rest followed by cycling during incremental workloads which increases 15 watts throughout each minute of exercise. The participant will cycle until volitional exhaustion and/or the participant and/or test administrator determines to stop the test. Actual exercise time usually varies between 8-10 minutes.

06

What researchers measure

Primary outcomes

  1. Volume of oxygen consumed at peak effort

    Volume of oxygen consumed at peak effort during CPET 1 and during CPET 2.

    Time frame: During intervention on day 1 and during intervention on day 2; assessed through study completion, approximately 4 years from study start date.

  2. Volume of oxygen consumed at ventilatory/anaerobic threshold (VAT)

    VAT is a non-invasive surrogate measure for anaerobic threshold, which is indicated during incremental exercise by a non-linear increase in rate of carbon dioxide production relative to rate of oxygen consumption.

    Time frame: During intervention on day 1 and during intervention on day 2; assessed through study completion, approximately 4 years from study start date.

  3. Rate of work performed at peak effort

    Rate of work performed at peak effort during CPET 1 and during CPET 2. Rate of work is measured in Watts.

    Time frame: During intervention on day 1 and during intervention on day 2; assessed through study completion, approximately 4 years from study start date.

  4. Rate of work performed at VAT

    Rate of work performed at VAT during CPET 1 and during CPET 2. Rate of work is measured in Watts.

    Time frame: During intervention on day 1 and during intervention on day 2; assessed through study completion, approximately 4 years from study start date.

  5. Heart rate at peak effort

    Heart rate at peak effort during CPET 1 and during CPET 2.

    Time frame: During intervention on day 1 and during intervention on day 2; assessed through study completion, approximately 4 years from study start date.

  6. Heart rate at VAT

    Heart rate at VAT during CPET 1 and during CPET 2.

    Time frame: During intervention on day 1 and during intervention on day 2; assessed through study completion, approximately 4 years from study start date.

  7. Systolic blood pressure at seated rest

    Systolic blood pressure at seated rest 1-minute before the start of CPET 1 and 1-minute before the start of CPET 2.

    Time frame: During intervention on day 1 and during intervention on day 2; assessed through study completion, approximately 4 years from study start date.

  8. Systolic blood pressure at peak effort

    Systolic blood pressure at peak effort during CPET 1 and during CPET 2.

    Time frame: During intervention on day 1 and during intervention on day 2; assessed through study completion, approximately 4 years from study start date.

  9. Respiratory Exchange Ratio (RER) at peak effort

    RER at peak effort during CPET 1 and during CPET 2. RER is calculated as the rate of carbon dioxide production divided by the rate of oxygen consumption, and during exercise is an indicator of participant effort.

    Time frame: During intervention on day 1 and during intervention on day 2; assessed through study completion, approximately 4 years from study start date.

07

Study locations

3 sites
  • ID Med
    Torrance, California 90505, United States
  • Ithaca College
    Ithaca, New York 14850, United States
  • Weill Cornell Medicine
    New York, New York 10021, United States
08

References and documents

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Aug 2018 to primary completion in Mar 2022, 43 months.

Of 73 non-industry interventional studies with no phase under Fatigue Syndrome, Chronic, half reached primary completion within 24 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 43. This study's 43 months is above that.

Counting every sponsor, half of 78 studies reached it within 23 months; a quarter within 11 and three quarters within 43.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 2, 2019
First posted
Jul 19, 2019
StartActual
Aug 1, 2018
Primary completionActual
Mar 15, 2022
CompletionActual
Mar 31, 2023
Last update
Jul 7, 2023
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jul 7, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04026425
Lead sponsor
Ithaca College
Responsible party
Sponsor
First posted
Jul 19, 2019
Start date
Aug 1, 2018
Primary completion
Mar 15, 2022
Completion
Mar 31, 2023
Last update
Jul 7, 2023

Study contacts

Betsy Keller, Ph.D.
study director · Ithaca College
Geoff Moore, M.D.
study director · Ithaca College

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jul 2023. You cannot join it, but the record below documents what was studied.

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