No easy way it seems.

[CQB]

It turns out, if you want rock-hard abs, you’re going to have to get them the hard way.

http://time.com/86095/the-best-sit-up-is-a-crunch/

 

[Grunt]

Like many other areas, sometimes the best way is the "old way".

Modern technology is a good thing, but it isn't always the best thing.