Had to really improvise. My quads (and others) are screaming pretty good from yesterday's workout and I couldn't handle the aerobic rider for more than a couple of minutes. So I went for a walk. It was a hilly route so I hit a solid 8 near the peak about 9 minutes into the walk. Total walk took right at 20 minutes. Not a particularly good HIIT, but could have been worse. The important thing was that I found a way to get in some type of 20 minute aerobic (okay, that may be stretching it a bit) workout. I'm comfortable with the idea that it may take a month before I have good workouts in place. I have plenty of time.