bummer iaawal! I wonder if you could work out a timing arrangement. It's only 20 minutes, after all.
I've been doing mine in the hallway when I'm at home in the tiny apartment because a) we don't have enough open floor space, and b) it annoys the crud out of Mr Woo when I do "cheezy" exercise videos.
Day 27 in a row today!!! and also a 30 minute walk.
I think when I hit day 30 I will go back to the beginning and try to do more of the exercises in the "unmodified" version and move from my dinky 1# weights up to 2#.
I've been thinking of that.