NCT04724499 · Dana-Farber Cancer Institute
Improving Cognitive Function Through High-intensity Interval Training in Breast Cancer Patients Undergoing Chemotherapy
(CLARITY)
What this study is about
The purpose of this research is to determine whether a 16-week high intensity interval training (HIIT) exercise program will improve brain health among women undergoing chemotherapy and also improve cardiovascular (heart) function.
View original scientific description
The purpose of this research is to determine whether a 16-week high intensity interval training (HIIT) exercise program will improve brain health among women undergoing chemotherapy and also improve cardiovascular (heart) function.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Written informed consent prior to any study-related procedures
- Women newly diagnosed (Stage I-III) breast cancer.
- Over the age of 18 years; children under the age of 18 will be excluded due to rarity of disease
- The effects of exercise on the developing fetus are unknown. For this reason, women of child-bearing potential must agree to undergo a pregnancy test and to use adequate contraception (hormonal or barrier method of birth control or abstinence) prior to study entry and for six months following duration of study participation. Should a woman become pregnant or suspect that she is pregnant while participating on the trial, she should inform her treating physician immediately.
- Will receive (neo)adjuvant chemotherapy
- Speak English
- Able to provide physician clearance to participate in the exercise program
- Able to initiate a supervised exercise program (free from any cardiovascular, respiratory or musculoskeletal disease or joint problems that preclude moderate physical activity)
- Have not experienced a weight reduction ≥10% within the past 6 months
- Currently participate in less than 60 minutes of structured exercise/week
- Does not smoke (no smoking during previous 12 months)
- Willing to travel to DFCI for assessments (54 visits total for those who elect the exercise group with on campus training session, 6 visits for those that elect the exercise at home option, 6 visits for those assigned to the control group)
- Ability to understand and the willingness to sign a written informed consent document.
Exclusion criteria
- Patients should not have any uncontrolled illness including ongoing or active infection, uncontrolled diabetes, hypertension or thyroid disease
- Patients with other active malignancies are ineligible for this study.
- Patients with metastatic disease
- Medical history of coronary heart or artery disease, chronic or acute congestive heart failure or history of systolic or diastolic insufficiencies
- Participates in more than 60 minutes of structured exercise/week
- Orthopedic or other restrictions or contraindications to high-intensity (cycling) exercise
- Have a pacemaker or any implantable device that are not MRI safe; the BWH/DFCI Standard MRI screening form
- Is unable to travel to DFCI
- Patients who are pregnant
- Patients with claustrophobia
- Subjects, who in the opinion of the investigator, may not be able to comply with the safety monitoring requirements of the study.
Where
- Boston, Massachusetts
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jan 22, 2026 · Source of record for eligibility and locations