| This is not an easy exercise. It's an advanced level movement. To keep your feet up against the wall you will find that your feet need to be elevated above the level of your head and shoulders and you will need to push yourself "into" the wall with your arms a bit as well. This exercise looks easy but it is not. If you're a beginner this might be too hard for you. This exercise requires some (pre)conditioning such as having strong arms and shoulders and an already relatively solid core. For those that already have above conditioning requirements met, they will find this exercise challenging in the first few weeks, but later on the execution of this movement should get easier. This exercise will tighten and strengthen your core to the max. That's how effective it is! One last thing to point out is that you need to make sure you lean up against a solid wall. If you lean up against drywall, you might go right through it because of the force with which you are pressing up against the wall surface. Thus, choose your walls carefully! | 
