A Study Evaluating an Intermittent Fasting Intervention in Adults with Breast Cancer and Overweight or Obesity

Primary Objective

Join a weight loss research study for men and women aged 18-65 with breast cancer. Receive a free 6-month diet and exercise program and monetary compensation.

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If you decide to participate in the study, you will be on an intermittent fasting diet three days per week to reduce what you are eating for 6 months. On the intermittent fasting diet days, you will only eat about 500 calories per day. On the other four non-fasting diet days per week, you will eat a reasonable, healthy diet but will not have to limit your calorie intake.

Main Procedures Involved: You also will attend regular weight loss group meetings (60-90 mins) and exercise sessions (45-60 mins) for 6 months.. Both are either in-person at the Anschutz Health and Wellness Center or virtual. The weight loss group meetings are held weekly for the first 3 months and then monthly during months 4 through 6. You will attend weekly exercise sessions that will focus on aerobic, resistance, and flexibility exercises. You will be asked to gradually increase your physical activity level during the study.

Duration of Participation: Your participation in the study will be 6 months, once the intervention has started.


18 to 65 years


We are looking for adults that are 18 to 65 years old that have a BMI between 25-45 kg/m2 and have been diagnosed with breast cancer (stage 1-3) within the past 10 years. You also must live or work within 30 minutes of the Anschutz Health and Wellness Center to participate in the study...


$250 if you complete all outcome measurements


Anschutz Health and Wellness
Outpatient CTRC
University of Colorado Hospital

Principal Investigator
Photograph of Vicki Catenacci

Vicki Catenacci

Study ID

Protocol Number: 23-1546

More information available at ClinicalTrials.gov: NCT06399276

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