Ключевые слова: 20s, 30s, 60s, action, activity, adult, aged, athletic, ball, caucasian, chat, competition, concentration, court, discuss, double, elderly, european, exercise, female, fitness, game, gesture, hobby, motivation, net, opponent, outdoor, play, player, playground, playing, practicing, racket, racquet, recreation, serve, serving, sport, sporty, talk, technique, tournament, training, vitality, woman, workout, young,