Musculoskeletal Cancers Remote Monitoring and Care

Inclusion Criteria: * primary sarcoma or metastatic bone disease of the lower extremities or pelvis. * undergoing evaluation for (or have recently undergone) non-surgical or surgical intervention. * recent history of home ambulation. Exclusion Criteria: * under 18 years of age at the time of study enrolment * inability to comprehend consent form and give informed consent * no access to a smartphone (iOS or Android) to interface with watch application * tattoos located on the skin of the wrist or forearm where the watch will be placed or other skin conditions preventing adequate sensor function * amputation or other disease of the arm or skin that prevents wear of a smart-watch device * inability to tolerate watch for at least 12 hours per day on at least 80% of days in a four-week period