Study Type

Women's Health

Study Purpose

Women often sleep less (and worse) as they get older. Unfortunately, little is known about how metabolism changes when someone gets less sleep.

The SLEEP-IN research study will evaluate how a woman’s metabolism changes when she gets less sleep than normal.

About the Study

Eligible women will maintain their normal sleep habits for half of the study (4 nights) and then have their sleep shortened for the other half of the study (4 nights). The order of these sleep periods will be randomly assigned.

During the restricted sleep period, women will stay 4 back-to-back nights in the Pennington Biomedical Inpatient Unit and will follow specific instructions about when to go to sleep and when to wake up. During the normal sleep period, women will only stay 1 night at Pennington Biomedical.

Study Design

Number of Visits:

  • 1 screening visit
  • 12 study visits
    • Including 5 overnight stays at Pennington Biomedical


  • Height and weight measurements
  • Vital signs (blood pressure and heart rate)
  • Blood tests
  • DXA scan (to measure muscle, bone and fat)
  • Questionnaires
  • Activity tracking
  • Insulin sensitivity test
  • Tissue sampling (muscle and fat)
  • Eat provided meals

Study Qualifications

To qualify for this research study, participants should:

  • Be female
  • Be postmenopausal (meaning, have not had a menstrual cycle for 1-year or more)
  • Have a BMI between 25 – 35 calculate your BMI
  • Sleep an average of 6.5 hours or more per night

*You may not qualify for this study based on other eligibility criteria. The study coordinator will go over this information in detail.

Study Duration

Participation in this research study will last approximately 3 months.


Compensation of up to $1,200 is offered for the completion of this study.

Study Contact

If you are interested in volunteering for this research study, click here to screen online, call 225-763-3000 or email

If you think you may be eligible, please click the button below to screen online.


Please do not fill out this questionnaire for anyone other than yourself unless you are their legal guardian.
If you know someone who may be interested please direct them to the site or have them call us directly at 225-763-3000.


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