Ключевые слова: active, activity, adult, african, african american, american, black, concept, couple, court, elderly, exercise, female, fit, fitness, fun, happiness, happy, healthy, leisure, lifestyle, male, man, mature adult, mixedrace, people, person, playing, recreation, retired, retirement, senior, sport, tennis, tennis ball, tennis court, together, training, two people, woman, workout, young,