Ключевые слова: ache, arthritis, bad, body, bone, broken, chronic, city, discomfort, disease, exercise, health, healthy, hispanic, human, hurt, illness, injured, injury, jogging, joint, knee, knee pain, kneecap, latino, leg, legs, man, medical, muscle, muscles, older, osteoarthritis, outdoor, outdoors, outside, pain, painful, park, person, portrait, problem, rheumatism, runner, running, sport, stretching, training, trauma, workout,