Effect of Knee Pain on Walking Biomechanics

Inclusion Criteria for Knee Osteoarthritis Arm: * At least 45 years old * Unilateral knee pain with walking that averages at least 3 out of 10 on a numeric pain rating scale * Unilateral knee stiffness that lasts less than 30 minutes after periods of inactivity * Unilateral symptoms on most days for at least the past 3 months Exclusion Criteria for Knee Osteoarthritis Arm: * History of knee replacement surgery * Opiate use within the past 3 months * Narcotic use within the past 3 months * Known medical condition that affects walking mechanics, besides knee osteoarthritis * Known medical condition that affects pain perception * Inability to walk for 30 minutes without using an assistive device * Body weight greater than 300 pounds * Known allergy to adhesives * High risk for a cardiovascular event * Currently pregnant * Anticoagulant use within the past 3 months * Intraarticular knee injection within the past 3 months * Known history of hypersensitivity to local anesthetics of the amide type * History of lower body pain or injury, besides knee osteoarthritis, within the past 6 months Inclusion Criteria for Healthy Arm: * At least 45 years old * No lower body pain or injury within the past 6 months Exclusion Criteria for Healthy Arm: * History of knee replacement surgery * Opiate use within the past 3 months * Narcotic use within the past 3 months * Known medical condition that affects walking mechanics * Known medical condition that affects pain perception * Inability t…