I'd originally intended to do P90X Legs & Back today, but my legs have taken a pounding with Insanity's Max Interval Circuit and Max Interval Plyo this week. With another "Max" workout on tap for tomorrow, there's no way my aching quads, hamstrings and calves could have survived Legs & Back (and still have sufficient time to recover). At the same time, I didn't want to skip my back workout.
The solution? I made a slight change to my P90X/Insanity Hybrid calendar, removing Legs & Back from the second half of the 90-day schedule. In its place, I decided to do 100 pull-ups in as few sets as possible -- plus Ab Ripper X (which I've memorized).
Not only was I able to get through this workout in less than half an hour, I had an entirely Beachbody-free morning. (Sadly, I had to miss my morning ritual of fiercely whispering along with the DVD intro: "Beach-BODAAAYYY!")