Ключевые слова: ache, adult, asian, athlete, calf, concept, endurance, exercise, feet, fit, fitness, health, healthy, hurt, injured, injury, jogging, joint, legs, lifestyle, male, man, marathon, medical, morning, muscle, nature, outdoor, outside, pain, painful, park, people, person, physical, pull, race, recreation, road, runner, running, shoes, sport, sprain, summer, training, treatment, walking, workout, young,