Ключевые слова: ache, adult, anatomy, arthritis, back, backache, bending, body, challenge, chronic, confidence, cramp, disease, effort, emergency, exercising, health, healthcare, healthy, hurt, ill, infection, injury, kidney, lower, lumbago, male, massage, medical, medicine, muscle, osteoporosis, pain, painful, person, problem, red, sick, spinal, spine, sport, stone, workout,