20 sek work 10 sek break x 2 rounds
1. Russian twist
2. Plank
3. Hip raise
4. Alt. Heel touches
5. Seated scissor kicks

20 sek work 10 sek break x 2 rounds
1. Heel touches
2. Plank step up
3. Plank walk out
4. Cross Crunches
5. Bicycle crunch

X 2 (=total 8rounds) = 20 min