What to do when planks and prone cobras are no longer difficult?

[CaraBeth]

I'm going through my second round of the program, in stage 2. The specified time in this stage for these exercises is 60-90 seconds, I think, but I am holding them 2 minutes. Should I work on increasing time, or are there modifications to make the exercises more difficult? Thanks!

[missjane]

http://www.wannabebig.com/training/g...or-killer-abs/

[Lil Messi]

yay! thanks for the link missjane! The "wall march" looks ridiculous.

I've been doing plank for years and also need something a little more challenging.

I recently tried doing plank on the swiss ball, and holy hell, that was challenging enough! Can't wait to see what happens when i try these others...

[rubyam]

In the book there are some suggestions for making plank more difficult first by using a swiss ball and bench and then by lifting one leg.

For cobra I tried lifting my legs, not sure if that is the best thing, but that's all I could think of.

[Evie]

OMG. My abs hurt just looking at the wall march pics.

[ZeeSparrow]

Originally Posted by Evie

OMG. My abs hurt just looking at the wall march pics.

x2!!!

[LancelotsLover]

I think I'm gonna try those. I'll let you know how stupid I feel when I can't do them!

[biggsy]

Do you have access to a TRX system? You can do some killer ab exercises with that - even a VERY unstable plank!