Inclusion Criteria:  Age 45 years and older Able to perform mild exercise Able to wear DREEM 2 Headband Able to wear a Fitbit wrist watch Able to perform the Everlywell biomarker procedure Able to Understand and Speak English Able to operate a digital device like mobile phone, iPad, or computer Self-reported history of problems with cognitive impairment: memory, concentration, and processing information Only participants cognitively able and willing to provide consent will be included.  Exclusion Criteria:  Under 45 years old Prohibited from or unable to perform mild exercise Unable to wear wrist watch or headband devices, or unable to supply pinprick blood sample for any reason Unable to speak or understand English Unable to use mobile device/smartphone technology Unable or unwilling to consent for any reason.