Core Workout

3 Rounds of:
10 Leg Lifts
10 Upper Superman
20/20 Chinnies
10 Back Leg Lifts

3 Rounds of:
15 GHD Situps
15 Back Extensions

3 Rounds, new every 3rd minute
10 Hollow Rocks
10 V-ups
10 Knee-hugs
10sec Hollow Hold