Ключевые слова: 20s, active, assistance, athletic, balance ball, body, caucasian, coach, determination, exercise, exercise ball, exercising, eyes closed, female, fit, fitness, fitness studio, focused, guidance, gym, health, health club, healthy, helping, indoors, instructor, leisure, lifestyle, male, man, neck exercise, personal trainer, physical, physique, professional, recreation, relaxation, relaxation exercise, shape, sportswear, strong, trainer, training, wellness, woman, work out, young adult,