Inclusion Criteria:

• Age 18-75, inclusive.
• Diagnosis of knee injury. For participants enrolled from the Mayo healthcare system database, knee injury identified from electronic medical records.
• Pain Numerical Rating Scale score of 4 or greater on a 0-10 scale (0 = no pain, 10 = pain).
• Participants must be diagnosed with a knee injury and the next step of care is either a home exercise program or external physical therapy ordered at the academic center.
• Prescribed external physical therapy (i.e., therapy not completed at Mayo Clinic in Rochester/Minneapolis).

Exclusion Criteria: 

• No access to android or iPhone smartphone.
• BMI greater than or equal to 35.
• Previously completed series of physical therapy visits for knee injury within the past 12 months for the same injury (received one introduction PT session as seen in executive program will not be considered an exclusion).
• Recommended by a physician for consideration of total knee replacement.
• Diagnosis of rheumatoid arthritis, fibromyalgia, gout in the knee, or other systemic rheumatic disease.
• Hospitalization for a stroke, heart attack, heart failure, or had surgery for blocked arteries in the past 12 months.
• Total joint replacement knee surgery, bucket-handle meniscus tear, ACL tear, or other knee surgery in the past 12 months.
• Unable to speak English.
• Active diagnosis of psychosis.
• Fall history deemed by a physician to impose risk for potential injury with participation in a home-based exercise program.
• Severely impaired hearing or speech.