Ключевые слова: 4048, action, active, adult male, american, athlete, athletes, athletic, box, cardio, caucasian, coaching, competition, endurance, european, exercise, exercises, fitness, functional, functional training, group, gym, health, healthy, intense, interval training, jumping, leg endurance, leg muscles, male, man, people, power, spain, sport, sports, squat, stepping, steps, strength, strong, training, weight, women, workout,