Sleep Chatbot Intervention for Emerging Black/African American Adults

Inclusion Criteria: * male or female ages 18-25 years old * self-identified as Black/African Americans (BAA), * poor sleep \[Insomnia severity index (ISI) \>10\] * having at least one of the cardiometabolic risk factors on the Life's Essential 8 checklist for cardiovascular health, as defined by the American Heart Association, including health factors confirmed by fasting blood testing during the first lab visit (fasting blood glucose ≥110mg/dL, high-density lipoprotein (good cholesterol) ≤ 40 mg/dL for males and ≤ 50 mg/dL for females, triglycerides ≥150mg/dL, total cholesterol ≥200 mg/dL, blood pressure ≥130/85mmHg, waist circumference≥40 inches for males, ≥35 inches for females) or healthy behaviors such as short sleep (\<7 hours), smoking or inactive (\<150 minutes/week of moderate aerobic activity such as gardening, social dancing, or \< 75 minutes/week of vigorous aerobic activity such as running, swimming laps, jumping rope), and (e) own a smartphone (iPhone or Android). * own a smartphone (iPhone or Android). Exclusion Criteria: * self-report medical conditions \[i.e., major depressive disorder \[Patient Health Questionnaire-9 (PHQ-9) ≥15) * diagnosed obstructive apnea\] that may affect sleep * regular use of medications with substantial impact on sleep and cardio-metabolic markers * shift worker * smoker * alcohol abuse (Alcohol Use Disorders Identification Test--short form score ≥7 for males and ≥5 for females) * self-report pregnancy/lactation.