I have switched from Yoga to riding the exercise bike at five-freakin'-twenty in the morning. Yoga was really good for the blood pressure, but not so much for the cholesterol. It's not that I'm all concerned about my health or anything, it's just the M2 and I both have high cholesterol and I don't want her to beat me at the numbers game.
We tend to be a bit competitive around here, heh, heh. We compete over who has the lowest delinquency rate (she always wins that one) or who can put the most members of a certain pathologically obnoxious family in jail for Christmas or who can collect the most urine or make the most people cry in one week, etc. etc. I'd be ticked if she got her cholesterol lower than mine.
I have a recumbent exercise bike that works out pretty good. You don't actually have to be awake to ride it. I just set the timer, and snooze while my feets do all the work.
The only problem is that I like to listen to the I-Fraud while riding. (Hat tip to Cheesehead and her T-Faux.) I've really got to do something about the music on that thing. When it plays the theme song from Speed Racer (Go Speedracer! Go Speedracer! Go Speedracer! Go! Go!) right before Barbra Streisand singing "Papa, Can You Hear Me?" it makes it tough to keep any sort of consistency going in the workout.
And it makes you weird.