Workout Update: 645 Cardio/MBF Day 21

Day 21 was the final day of MBF, which was the dynamic recovery routine. Again, I did the 15-minute cardio routine from 645 as a warm-up for the MBF workout.  I cannot really say that my flexibility improved all that much during the three week period, but it did not regress either. Starting tomorrow, I am going to do another round of Lift 4, which I plan to do in the mornings, and then do the 645 cardio workout in the evening. But, in that one, I am going to try to do more challenging exercises (like plank jacks and mountain climbers) to keep improving my stamina.