Ключевые слова: active, adult, athlete, challenge, circle, class, club, collaboration, core, diversity, endurance, exercise, exercising, female, fit, fitness, floor, friends, group, guy, gym, gym class, health, healthy, help, loss, male, man, men, muscle, people, person, personal trainer, power, sit, sit up, sport, sports, strong, support, team, teamwork, together, trainer, training, weight, woman, women, workout, young,