Ключевые слова: active, activity, adulthood, aged, aging, athletic, baby boomer, balance ball, ball, close up, dumbbells, elderly, energy, exercise, fit, fitness, fitness ball, friends, generation, group, gym ball, gymnastics, health, healthcare, interest, leisure, life span, lifestyle, mature, old, pensioner, pilates ball, retired, retirement, selective focus, senior, social, society, sport, stability ball, swiss ball, therapy ball, training, waist up, weight, wellness, workout, yoga ball,