Build strength, stamina, and endurance with high-intensity intervals of 20 seconds on, 10 seconds off. This sweaty sequence includes series of Squats, Mountain Climbers, Lunges, Burpees, and Jumping Jacks. Test your stamina with one final round of 40 seconds on and 20 seconds off. This class was previously streamed on May 4, 2021. Props Required: 5-10 lb. dumbbells.