Actually that sounds pretty darn awesome if you ask me. When I first joined Club Sport I had a personal trainer for 2 weeks. It was actually pretty cool since I never had one before.
He was the first person to teach me the plank. I was in alright shape at the the time so the plank wasn't difficult for me and he was actually impressed how easy I held the position.
But now that I'm out of shape, I really feel it. 30sec is all I can do. But since my problem area is my mid-section, then I need to focus on it. Anyone else up for trying to hold a 5min plank? Steps 17 and 18 I have done in the past and it actually feels pretty good.