Inspired by this Youtube vide entitles 6 minutes of pain (from min 3), with good variants by Paolotto
1) 1 down...
...butt up
2) side planks...
...continues, no stopping
3) Vs
flatten out and then get back to V
4) 90-90 crunch
just chest up and back on the ground
5) starfish crunch...
...alternate legs
