Ключевые слова: abs, activity, adult, african, afroamerican, athletes, athletic, body, bodybuilder, care, caucasian, coach, doing, elbow, exercise, female, fit, fitness, floor, group, gym, gymnastic, health, healthy, helping, hobby, indoors, instructor, leisure, lifestyle, loss, male, man, mat, muscles, people, personal, physical, plank, professional, sport, sporty, supervision, trainer, training, weight, woman, workout, young,