Ключевые слова: action, activities, adult, adventure, bicycle, bike, biker, biking, bmx, concepts, courage, cycle, cycling, cyclist, danger, day, energy, equipment, exercising, extreme, freedom, fun, healthy, horizontal, jumping, leisure, lifestyles, males, men, midair, motion, nature, outdoors, park, people, person, power, professional, pursuit, recreational, riding, skill, sky, speed, sports, sun, sunlight, wheel, young, youth,