Hanna-Maria Seppälä showing a basic ab exercise everyone should be able to do

“Finnish swimmer Hanna-Maria Seppälä is showing a basic ab exercise everyone should be able to do. If you can not do this one, I recommend you forget all other ab exercises and practice this one. You have to be able to control your abs enough to sit up without using your hands/arms & lifting the legs.”

http://youtu.be/6Pb0s4a70ek