Workout Update: Dig Deeper: Day 4

Day 4 is the second upper-body circuit workout of Phase 1. This one has two blocks/circuits, each with 4-5 resistance exercises (mostly using dumbbells, with a couple of bodyweight-only exercises) and an ab/core-focused exercise. As with the other workouts in this phase, each circuit is performed three times, but in this workout, each set has 12 reps. The total workout time, including the warm-up and cooldown, is just under 50 minutes. The "main" portion of the workout goes by quickly, however, since you are almost constantly moving, and the rest periods are short. I was not sweating as much as I was in yesterday's total body circuit workout, but my heart rate did get over 130 a few times.