Easing aching kneecaps.  Patellofemoral pain can make it hard to squat, go down stairs, or just sit through a movie.
D000203:Activities of Daily Living; D015444:Exercise; D005260:Female; D015438:Health Behavior; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D053580:Muscle Strength; D046788:Patellofemoral Pain Syndrome / Q000517:prevention & control*; D016387:Women's Health