Gladiator Core Program Day 3

Warm-up
Run, bike, etc
Stretch the hip-flexors/hamstrings

Workout:
4 sets of 100 sit-ups
Weighted sit-ups, 3 sets of 8 repetitions

(Can be done as a superset).
Butterfly kicks 3x 30reps
Toe-touches 3x 12reps
Crunches 3x 30reps
Bicycle 3x 30reps

Crunches 4 sets of 35reps