Workout Update: 654 Cardio/Lift 4 Hybrid: Day 4

Day 4 was a lower-impact version of the 645 cardio routine in the morning and the shoulders workout, which is an interval workout, in the evening. I again used my ending weight from the last round as the starting weight for this round, and it was still extremely challenging. I do like the interval workouts in Lift 4 more than the 50/50 workouts, since you are only doing the HIIT moves for 30 seconds in intervals.