A cardio high-intensity interval training (HIIT) workout alternates short bursts of very hard effort with quick rest periods. High-intensity interval training (HIIT) uses fast bursts of hard work like sprinting or jump squats, followed by short rest breaks. These short routines spike your heart rate, burn calories fast, build muscle, and take only 10 to 30 minutes #hiit #cardio #loseweight #weightloss
