Ключевые слова: band, buttocks, caucasian, class, course, crouch, elastic, exercise, expander, female, fit, fitness, girl, health, home, internet, laptop, learn, lesson, loop, lose weight, loss, muscles, online, reduce, resistance, rubber, situp, sport, sportswear, squat, strength, training, translation, video, warmup, watch, weight, woman, workout, young,