การออกกำลังกายแบบเข้มข้นเร่งเร็วกำลังได้รับความนิยมในสหรัฐ

Express fitness is gaining popularity in the United States, as people try to squeeze exercise into their hectic schedules. To accommodate them, gyms are offering more total body workouts in a compressed period of time. VOA’s Jill Craig has more.