Ключевые слова: 17s, 30s, 55s, activity, aerobic, american, balance, ball, center, club, concentration, different ages, equipment, european, exercising, female, fitball, fitness, flexible, german, gym, gymnastic, healthy, indoor, leisure, mat, motion, person, physical, pilates, portrait, position, practice, soft, softball, sporty, stretch, stretching, three generations, training, weight, woman, workout, yoga,