Ключевые слова: 55s, adult, american, austrian, ballet, barre, britain, canadian, caucasian, class, dance, elderly, european, exercise, female, fit, fitness, french, german, group, gym, health, healthy, lifestyle, male, man, mature, ordinary, pensioner, pilates, retired, s3niorlife, senior, sportswear, stretch, third position, training, woman,