Ключевые слова: ache, athlete, athletic, back pain, body, caucasian, fit, fitness, gym, health, healthy, healthy lifestyle, in pain, indoors, leisure, leisure activity, leisure center, lower back, male, man, massaging, muscle, muscle pain, muscular build, pain, painful, pool, poolside, recreational pursuit, rubbing, sore, sport, sportsman, sporty, suffering, swimmer, swimming, swimming pool, swimming trunks, swimwear, touching, water, water sport, young adult,