Impact of Nutrition, Sleep, and Physical Activity on Intellectual Function and Muscle Mass in Older Adults

Inclusion Criteria: * Over 65 years of age. * Living in Japan. * Living independently with or without carer support. * Able and willing to wear a Fitbit for the duration of the study (≥20 hours a day, including during sleep). * Individuals that are able and willing to receive and act on interventions. * Has capacity to consent to inclusion in the study. * Smartphone access to allow Fitbit installation and setup. * Has one or more of the following comorbidities: * BMI \<20 (65-69 years), \<21.5 (≥70 years) * Pre-frail or Frail: scoring 1-2 (pre-frail) or 3+ (frail) based on the FRAIL questionnaire * Sarcopenia: low grip strength (female \<18 kg, male \<28 kg); Gait speed (\< 1m/s); low Skeletal Muscle mass Index (female 5.7 kg/m2; male 7 kg/m2) Exclusion Criteria: * Individuals receiving full time care in a care facility. * Individuals that are unable to receive and/or act on interventions. * Individuals who are existing wearable users, or who have prior experience using a wearable to manage their health. * Individuals with uncontrolled hypertension, diabetes, CKD or with cardiac pacemakers and/or cardiovascular stent(s). * Individuals who have any additional condition or situation that the Investigator (PI) or designee determines as inappropriate for participation in this study. * Individuals with no comorbidities as defined above.