RECRUITING Not applicable ClinicalTrials.gov

Prolonged Overnight Fasting and/or Exercise on Fatigue and Other Patient Reported Outcomes in Women With Hormone Receptor Positive Advanced Breast Cancer

Sponsor: University of Miami • ClinicalTrials.gov ID: NCT06123988

Registry updated: 2026-08-26

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Description

The purpose of this study is to test whether four different supportive care programs can reduce fatigue in women with advanced or metastatic breast cancer who are receiving a medication called a CDK4/6 inhibitor (palbociclib, ribociclib, or abemaciclib) alongwith endocrine therapy with or without a PI3K or AKT inhibitor.

Interventions

Prolonged Overnight Fasting (Behavioral)
Participants will undergo a 12-week program of prolonged overnight fasting (POF) during which they will abstain from consuming food or drink after 8pm, and wait 12 to 14 hours before resuming eating the next day. Participants will fast overnight for six nights each week, with one night off, and log their fasting start and stop times and timing of food intake daily via text messaging, or via study-provided app accessible by web browser or smart phone, or via paper journal returned by mail at the end of each month. Participants will also complete one weekly session with a health coach to review their fasting log and any barriers to and/or facilitators of meeting the POF goals. Sessions may be delivered in-person, by telephone, or by video call based on participant preference. Sessions will last 15 to 30 minutes each, for a total of 12 sessions. Participants will be provided with a notebook with information and support to encourage meeting the POF goals.
Moderate-Intensity Exercise (Behavioral)
Participants will undergo a 12-week program consisting of three weekly sessions of moderate-to-vigorous aerobic and resistance exercises, under the supervision of a health coach. Sessions may be delivered either in-person or virtually via telehealth. Sessions will be tailored to the individual participant based on fitness level and symptoms at study entry, and limited to daylight hours as much as possible. Each session will last 30 to 50 minutes, as tolerated by the participant, for a total of 36 sessions. Participants will receive a Fitbit device to track their activity, and to provide heart rate monitoring during each session. Participants without access to wi-fi will be loaned cellular-enabled tablets to allow them to participate in telehealth sessions. Participants will also receive a notebook with information and support to encourage exercise.
General Health Education Sessions (Behavioral)
Participants will receive a general health education resource manual at study entry, followed by six bi-weekly sessions with a health coach to review the information. Six topics, one topic for each session, will be selected based on topics of potential interest to a population living with advanced breast cancer, focusing on general nutrition, healthy lifestyle, and quality of life, with no discussion of prolonged overnight fasting or exercise. Each session, administered via telephone or video call, will last about 15 to 30 minutes, and have a specific topic and call script for the health coach to follow to minimize any intervention drift and/or contamination. Participants will receive a Fitbit activity monitoring device and additional study materials at the end of their participation in the study.

Eligibility criteria

Inclusion Criteria: 1. Women 2. Able to provide written informed consent 3. Able to speak, read, and understand English or Spanish 4. Postmenopausal (including concurrent use of ovarian suppression) 5. Diagnosis of ER+ and/or PR+, hormone estrogen receptor-2 (HER-2)- or HER-2+ metastatic or locally advanced unresectable breast cancer 6. Initiation of endocrine therapy in combination with a CDK4/6 inhibitor (e.g., palbociclib, ribociclib, or abemaciclib), with or without hormone estrogen receptor-2 (HER2)-directed therapy (e.g., trastuzumab ± pertuzumab), or in combination with both a CDK4/6 inhibitor and a Phosphoinositide 3-kinase (PI3K) or Protein kinase B (AKT) inhibitor, within the past 90 days. a) Participants who switch from one CDK4/6 inhibitor to another due to toxicity or insurance constraints remain eligible, provided enrollment occurs within 90 days of initiating the subsequent CDK4/6 inhibitor in the metastatic or locally advanced setting. 7. Having not consistently (not equal to or more than 50% of the time) engaged in more than 90 minutes of moderate or 45 minutes of vigorous physical activity per week over the past 3 months 8. Having not consistently engaged in resistance training 2 or more days per week over the past 3 months 9. Having not consistently (not equal to or more than 50% of the time) engaged in structured fasting (i.e., not regularly fasting for ≥12hr/night) for the past 3 months 10. Approval from a medical oncology provider to participate. Exclusion Criteria: 1. Unable to provide consent 2. Unable to read or understand English or Spanish 3. Dependent on supplemental oxygen 4. Unstable cardiac disease 5. Insulin-dependent diabetes 6. Unable to walk 2 blocks without assistance (excluding canes) 7. Regularly maintaining a shiftwork schedule, i.e. working evening shifts, night shifts, or rotating shifts in the last 3 months 8. History of a clinical eating disorder 9. Unstable bone metastases 10. More than 90 days since initiation of endocrine therapy in combination with 1) a CDK4/6 inhibitor, with or without HER2-directed therapy, or 2) a CDK 4/6 inhibitor in combination with a PI3K/AKT inhibitor, in the metastatic or locally advanced. 11. Presence of a severe medical condition or psychiatric condition or medications that would preclude participation of the study intervention.

Conditions

HER2-positive Breast Cancer Advanced Breast Cancer

Locations

Arizona State University — Phoenix, Arizona, United States
University of Miami — Miami, Florida, United States
Dana-Farber Cancer Institute — Boston, Massachusetts, United States

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Official Source

Data sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

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