CORE FRIDAY 17042015 Workout

For time:
2 rounds of:
- 100 Flutter kicks (100 each leg).
- 90 sec plank hold.
- 80 Bicycles (40 each leg).
- 70 Toe touches.
- 60 Russian twists (6/4 kgs).
- 50 Sit-ups.
- 40 Back extensions.
- 30 Hollow rocks.
- 20 V-ups.