P20 Extending Sleep to Reverse Metabolic Syndrome

Screening and consent process. Potential participants will be informed about the study, provide verbal consent to be screened, and begin a multi-stage screening process consisting of a screening questionnaire (in person or by phone), an intake visit, and a home sleep test (OSA, sleep duration). The screening questionnaire will assess inclusion/exclusion criteria including demographics (NINR Demographic data), sleep duration and timing (STQ)70, insomnia symptoms (ISI), OSA symptoms (MAP), depressive symptoms (PROMIS depression v1.0), alcohol abuse (AUDIT), and self-reported habitual napping, sleep-promoting medication use, recent or planned shift work or trans-meridian travel, pregnancy/lactation, and current chemotherapy. Individuals meeting inclusion criteria based on the screening questionnaire will be invited to the CTSI visit. During the CTSI visit, the study team will describe the study and obtain written informed consent. MetS diagnosis will be confirmed based on measures of waist circumference, fasting glucose, serum triglycerides, high density lipoprotein cholesterol (HDL-c), and resting blood pressure. Waist circumference will assessed as the mean of 3 measurements taken at the level of the umbilicus using non-distensible measuring tape. Blood pressure will be assessed as the average of 3 recordings each taken 1 minute apart, following 10 minutes of inactivity. A 4th recording will occur if any two systolic or diastolic readings are \>5 mmHg apart. Fasting glucose, serum triglycerides, and HDL-c will be measured from blood samples drawn according to standard venipuncture protocol at the CTSI. Analysis will be completed at the CTSI lab using standard techniques for analyzing the blood samples. Retained participants will be trained to use a home sleep apnea testing device (Embletta MPR) to objectively screen for OSA, a wrist accelerometer, and a sleep diary to screen for short sleep. Written instructions and study team contact information will be provided. Participants will return the home sleep apnea testing device in a prepaid package. Data will be downloaded from the home sleep apnea testing device and scored by a sleep technician to confirm the absence of moderate/severe OSA (AHI ≥15). Baseline data collection. Retained participants will complete the remaining baseline measures for sleep duration, MetS risk behaviors (physical activity, sedentary behavior, diet quality, smoking, and alcohol use), sleep deprivation symptoms (quality of life/affective well-being, fatigue) and self-regulation. After baseline week 2, the study team will contact participants to remind them to return the accelerometer in the prepaid shipping package. Participants meeting all the inclusion criteria will be invited to participate in the intervention.