Workout Update: Lift 4/Shaun 20/645 Cardio hybrid: Day 53

On day 53, I did the Pure Cardio routine from Shaun 20 and the Shoulders (circuit) routine from Lift 4. Shoulders was very hard, and, like last week, I started out with the higher weight for all the exercises but had to drop the amount of weight I used for some exercises by the third set. Also, by the time I got to the burnout round, I could not do full curls with 15lbs and had to drop that to 10 in order to do the curls for the full 30 seconds with proper form.