Feasibility of Resting Intervals During Exercise Programs for Individuals With Knee Osteoarthritis

Inclusion Criteria:

* Age between 45 and 79 yo.
* Clinical diagnosis of primary, early to moderate stage knee osteoarthritis.
* BMI range \< 35 kg/m2.
* Sedentary lifestyle
* Knee joint is the most painful joint in the body.
* Ability to speak and understand English.
* Willingness to comply with all study procedures and be available for the duration of the study.

Exclusion Criteria:

* Non-OA disease of the knee.
* Advanced knee osteoarthritis
* Knee injection in the past 3 months.
* Major knee trauma/surgery in the past 5 years or previous knee surgery with hardware limiting cartilage assessment..
* Participate in regular exercise or physical activity .
* Participation in an intervention study for knee OA.
* Currently using a cane, walker or crutches to walk.
* History of cardiovascular disease or hypertension not controlled by medication.
* Two or more unexplained falls in the past year.
* Inflammatory, autoimmune disorders, neurological, systemic, muscular, or connective tissue conditions that affect walking or ability to exercise.
* Contraindication to MRI.
* Medical condition or characteristic of the participant that could place the individual at increased risk or preclude s/he from complying with study procedures.
* Pregnant female.
* Acute or terminal illness.