Every 30 seconds x 20 sets: 1 deadlift @ 65% of 1RM. 

Cash out:

:30s of each back and forth x 3 rounds:

Hollow rocks

Arch rocks

-Rest 1 minute then,

AMRAP in 6 minutes:

6 burpees

12 reverse crunches with a twist (6 each)

18 alternating V-ups (9 each)