Ключевые слова: actions, activity, adolescence, adults, bicycle, bike, bmx, boys, child, city, cycle, cycling, cyclist, danger, exercising, extreme, fitness, flying, fun, high, jump, jumping, leisure, lifestyles, males, man, men, midair, motion, mtb, one, outdoors, park, people, person, pursuit, recreational, riding, risk, silhouette, skateboard, skill, sky, speed, sports, stunt, summer, sun, teenagers, urban, young,