The planks are key moves throughout the entire program, and they actually work more than just your abs--your back, your legs, etc. There's really no getting around them. I would say do as much as you can in the plank and then go onto your knees to complete the exercise. You will get stronger. One thing I found useful in the later workouts (phase 3) was having my feet apart a little wider. It helped with stability.

That's a great idea! I also try to concentrate on the spot right in front of my eyes and count the seconds, then get a quick child's pose stretch at the end

I have a love hate relationship with planks.

At the beginning, I couldn't hold plank to save my life! But like one poster said, I did what I could then went to my knees, I had to do that for all the plank moves throughout the 90 days. My second time through the program, I can plank! I still do not like them, but they really work so many muscles that I like to do them and get through them. Keep at t, you will build up those muscles in time and surprise yourself!

I can do normal planks and plank-type stuff ok, its the reverse planks that are getting me