Clinical Research Directory

Inclusion Criteria: * Age 18-65 * 24h ABP readings indicating elevated blood pressure (BP) or hypertension (24h average systolic (SBP) of 115-145 mmHg or diastolic (DBP) of 75-90 mmHg). Patients taking antihypertensive medications will be permitted if stable dose for \>8 weeks * Time in bed \<8 hours and habitual sleep duration \<7 hours via actigraphy; * Smartphone user * Able to read/write in English. Exclusion Criteria: * High risk or presence of moderate to severe comorbid sleep disorders (i.e., obstructive sleep apnea AHI 15 or greater, restless legs syndrome, or insomnia) as assessed by the questionnaires and overnight obstructive sleep apnea at the baseline/screening * Resistant hypertension, defined as \>4 antihypertensive medications or taking medications and standardized in lab BP \>130 mmHg SBP or 80 mmHg DBP at screening History of cognitive or neurological disorders (e.g. dementia, Parkinson's, Multiple Sclerosis) * BMI\>50 kg/m2 or arm circumference greater than extra large cuff * Presence of major psychiatric disorders (e.g. schizophrenia, bipolar disorder) * alcohol abuse on the Audit-C (score \>4 for men, \>3 for women) * drug use on the NIDA-Modified ASSIST (score \>3),90 * moderate to severe depressive symptoms (PHQ-8 \>10) * Unstable or serious medical illness that would interfere with participation (cancer, renal disease on dialysis) * Overnight work more than 1x per month * Use of hypnotic or stimulant medications * Situations that would significantly impact the ability to extend sleep, including overnight caregiving responsibility for children under the age 1, elderly or disabled adults \>1x per week * Inability to read or write in English * Pregnancy/desire to become pregnant during the study period.