20 seconds work, 10 seconds rest x 4 of:
1/2 BW Abmat situp
Crossing the floor (Pushup walk or Alligator crawl)
Travel in order down the list, and complete 4 intervals of 20 on, 10 off at each movement before moving to the next. Complete the entire list x 3.
Goal is to start strong and sustain output in each interval of each set.