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HIIT and Protein Study

University of North Carolina at Chapel Hill


The primary purpose of this research study is to understand the effects of increasing protein (EAA) in the diet, with or without high intensity exercise (HIIT) for 8 weeks in overweight/obese individuals on body composition, muscle characteristics, and aspects of metabolism (i.e. how much and type of fuel you burn). A second purpose is to explore how these effects might differ between men and women.


Men's Health, Muscles, Nutrition, Obesity, Women's Health


Medical Treatment Outcomes



25 - 50 years


Study Population

Overweight or obese, but healthy, men and women 25-50 years old.


Katie Hirsch
SPA Student Assistant
Exercise and Sport Science

For questions, contact:

Katie Hirsch
(919) 962-1663

Recruitment Period End

December 31, 2019


Primary Location
UNC main campus
Fetzer Hall, Chapel Hill, NC 27514, USA

Study Qualifications

Gender Any

Age Range 25 - 50 years

Participant qualification(s) - Healthy, non-smoking adult, between the ages of 30-50 years - Body mass index (BMI) of 27 - 40 kg·m-2 and/or body fat percentage ≥ 25% for men, and/or BMI of 25 - 40 kg·m-2 and %BF ≥ 30% for women.

Not eligible if: - Participating in more than 150 minutes per week of moderate exercise, more than 2 days per week of resistance training, or currently participating in high intensity interval training or participated in HIIT within the previous 12 weeks. - Lost or gained greater than eight pounds within three months prior to the enrollment. - Currently consuming a high protein diet (≥1.6 g·kg-1·day-1 and ≥25% of calories from protein). - Have current and/or history of cardiovascular disease, diabetes, metabolic, thyroid, pulmonary, renal, hepatic, gastrointestinal, musculoskeletal disorders or medical or surgical events, such as bariatric surgery, heart surgery, or any joint or musculoskeletal surgeries occurring in the 6-months prior to enrollment, that may significantly influence study outcomes or prevent safe participation. - Have uncontrolled hypertension or an abnormal electrocardiogram.

Number of Visits

    » 4-22 In person visit(s)

    1 Enrollment session: ~45 minutes; 3 Testing sessions (1 at baseline, 1 at 4weeks, 1 at 8weeks): ~90 minutes; 16 Training sessions (2 days per week for only those that are randomized to the HIIT and EAA+HIIT groups): ~30-90 minutes per session.

    » 4 Remote visit(s)

    4 electronic correspondences (EAA or CON groups only)

Participation Period

8 weeks


By clicking I am interested, your contact information will be sent to the researcher/study coordinator for this study. The coordinator will respond by email with additional information on how to proceed.