If you’re feeling really good and want to make the Shortcut to
Shred sessions even more intense, start performing a “cardio
accelerated rest-pause dropset” on the last set of each major
exercise. The technique is as brutal as it sounds, believe me.
Cardio accelerated rest-pause dropset: Take the last set of
each exercise to muscle failure. Then, rack the weight and
perform cardio acceleration by running in place for 15-20
seconds. Pick up the weight and continue doing reps until you
reach muscle failure again. Immediately decrease the weight.

by 20-30 percent and lift until you reach muscle failure again.
You are now done with the set and ready to move to the next
exercise.