That which I once mocked, I now do

Maria posted a thing on her Facebook page that I found intriguing. It's the agenda for a 30-day planking challenge, which looks pretty cool, and would probably be an awesome thing for me to do anyway. And I like challenges. Here's the schedule:
Day 1 and 2 ~ 20 seconds ... ... Day 3 and 4 ~ 30 seconds ... ... Day 5 ~ 40 seconds ... ... Day 6 ~ Rest ... ... Day 7 and 8 ~ 45 seconds ... ... Day 9, 10 and 11 ~ 60 seconds ... ... Day 12 ~ 90 seconds ... ... Day 13 ~ Rest ... ... Day 14 and 15 ~ 90 seconds ... ... Day 16 and 17 ~ 120 seconds ... ... Day 18 ~ 150 seconds ... ... Day 19 ~ Rest ... ... Day 20 and 21 ~ 150 seconds ... ... Day 22 and 23 ~ 180 seconds ... ... Day 24 and 25 ~ 210 seconds ... ... Day 26 ~ Rest ... ... Day 27 and 28 ~ 240 seconds ... ... Day 29 ~ 270 seconds ... ... Day 30 ~ Plank for as long as you can.
I'm on Day 2 right now, and I'm loving it so far. The instructions are to do at least one plank rep in that day's time period. I'm doing two reps so far, though I'll soon bump that up to four reps per day.
You know what's awesome? I'm feeling the physical effects of the planking already. Obviously, I'm out of shape. The planking is supposed to help with my core strength, which is something I really need. Also, anything that'll make me stronger is a good thing.