Inclusion Criteria:

• * 55-85 years of age
• * Diagnosis of Osteoarthritis within the prior 6 months
• * Symptomatic OA defined as self-report:
• * Pain in the knee(s) on most days of the month
• * Difficulty with at least one of the following because of knee pain:
• * walking ¼ of a mile
• * climbing stairs
• * getting in and out of a car, bath, or bed
• * rising from a chair
• * or performing shopping, cleaning, or self-care activities
• * Radiographic KL grade II-III (using Kellgren and Lawrence criteria) of one or both knees
• * Physically able to participate in strength training - able to do one chair stand unassisted in order to test change in 30-second chair stand
• * Ambulatory and community-dwelling
• * Sedentary or insufficiently active as measured by the PAVS
• * Access to Wi-Fi in defined exercise space
• * BMI of 20-34.9 kg/m2
• * Document medication specific to OA and knee pain
• * Willing and able to provide consent

Exclusion Criteria:

• * Neurological conditions causing functional impairments (Parkinson's disease, MS, ALS)
• * Diagnosis of dementia
• * Inability to complete ≥1 ADLs without assistance.
• * Knee surgery in the past 6 months
• * Severe osteoporosis T-score \< -3.5
• * No concurrent enrollment in physical therapy for knee pain
• * No concurrent enrollment in the Intermountain Arthrofit program
• * Under the age of 55 or ≥85
• * Asymptomatic OA
• * Not having knee pain or having significant knee pain (WOMAC Pain score of ≤3 or ≥18)
• * KL Grade 1 or 4
• * BMI above 34.9 kg/m2 or ≤20 kg/m2
• * Participation in formal strength training more than 30 minutes a week in the past 6 months.
• * PAVS - Participating in 150 minutes per week of moderate intensity physical activity or 75 minutes of vigorous intensity activity, or an equivalent combination of moderate and vigorous intensity physical activity.
• * Co-morbid disease that would threaten safety or impair ability to participate in a live and interactive strength training program
• * Symptomatic or severe coronary artery disease; peripheral vascular disease
• * Untreated hypertension
• * Active cancer other than skin cancer