Ключевые слова: action, challenge, compete, competition, course, difficult, dirt, dirty, diving, dust, endurance, energy, event, exercise, extreme, fast, feet, fit, fitness, grit, individual, jumping, legs, mental, mud, muddy, obstacle, outdoors, painful, participant, participating, people, physical, race, run, runner, running, shock, skill, sport, sporting, strength, strong, team, test, tough, toughest, water, wet,