Companion: Sensor-based Two-way Communication for Physical Activity in Older Adults

Inclusion Criteria: * Age 60 years and above- This intervention study focusses on this population demographic. * Participants have a body mass index greater than 25 kg/m2- This threshold for BMI is used to classify an adult as overweight or obese * No conditions preventing participation in physical activity lasting 10 to 30 min- Such conditions will limit prescription of physical activity/exercise components of the training program and that promoted using Companion. * Have a smart phone- The absence of a smart phone will limit the ability of remote communication with the study participant using Companion. Exclusion Criteria: * Engage in structured physical activity for more than 2 days/week lasting 30 min/session- Physically active participants will not be representative of typical adults \>60 y. Being active prior to study participation may mask the effects of the intervention. * Regularly use any assistive device for walking- Use of an assistive device would limit the ability to engage in prescribed physical activity. Future work can be tailored for sub-groups in the demographic being studied. * Likely to alter medications pertaining to cardiovascular or metabolic health- Altering medications during the study will influence change in selected outcome measures.