Ключевые слова: action, activity, adult, athlete, bicycle, blurred, caucasian, competition, competitive, concepts, cycle, cycling, cyclist, effort, endurance, exercise, fitness, helmet, hobbies, human, ideas, indoors, lifestyles, man, men, motion, pedal, people, person, professional, race, racing, speed, sports, sprinting, strength, track, training, triathlon, velodrome, wheel, young,