Ключевые слова: adult, athlete, athletic, bracelet, class, closeup, coach, concept, cross, exercising, fit, fitness, flexing muscles, friends, gadget, girl, group, gym, healthy, heartrate, indoors, instructor, lifestyle, man, many, people, person, personal, plank, sport, sportive, sports, sportsman, sporty, strength, strong, team, teamwork, technology, together, tracker, trainer, training, warmup, wearable, wellness, woman, working out, workout, young,