That is true! To tell the difference try and sit up where your feet are held down the entire time (sticking them under a couch). Then try a sit up with trying to press your feet into the ground without them under the couch (aka the janda curl). When your feet are under the couch the psoas is able to activate, and not just isolating the core.
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
This is the best presentation i've found, and the simplest, and cheapest solution for anchoring legs to isolate the abs.
Just did this today.
Keep up the hard work!
I was always told sit ups aren’t good because they work the psoas muscle. Is this true?
That is true! To tell the difference try and sit up where your feet are held down the entire time (sticking them under a couch). Then try a sit up with trying to press your feet into the ground without them under the couch (aka the janda curl). When your feet are under the couch the psoas is able to activate, and not just isolating the core.