Ключевые слова: active lifestyle, activity, adult, allergic, anxiety, bicycle, bike, breathing, chemical, coronavirus, covid 19, cross country, cycling, cyclist, dirt, eco, ecology, epidemic, exercise, filter, fit, forest, health care, individuality, infectious disease, isolation, man, mask, medical mask, mountain bike, mountain biker, moving, one, outdoor, pandemic, person, pollution, privacy, protection, respirator, ride, sport, sporty, transport, tree, vacation, weekend, wood, woodland,