I've been doing a lot of core/lumbar strength/stability work this week. I have pretty much nailed the 60-second elbow plank (4 stars!!!), and can manage a shaky 30-second after, but not a second 60-second. My lower right side is giving "Danger, Will Robinson!" feelings right now, though, so I think I need to take the weekend off of those.

I did two sets of arm and leg lifts yesterday, which are harder than you'd think, and one set today (see above, re: right side). Besides core strength, just having to hold myself on one arm and knee for 60 seconds is working my arm muscles.

My PT recommended an exercise ball. I'm going to get one today.