There are three purposes of this study. The first purpose is to examine the factors that allow patients that underwent total knee arthroplasty with the Journey II to return to recreational sports and/or work activities, and to achieve recommended physical activity levels (defined by the American Heart Association and the American College of Sports Medicine).~The second purpose is to examine the factors that limit the ability of patients to resume sports, work, and physical fitness training, including comorbidities, general health, complications, and other factors.~The third purpose is to use advanced sports medicine rehabilitation principles that involve staged progressive protocols to safely prepare patients for sports, work, and physical fitness training. Objective measurements of muscle strength, endurance, balance, and neuromuscular control will be used to determine when patients may be cleared to participate in these activities.
The main purpose of this study is to examine the factors that allow patients that undergo total knee arthroplasty to return to recreational sports and/or work activities, and to achieve recommended physical activity levels.