My back still has a few kinks (just like the rest of me), so I steered clear of the treadmill and also lifted weights 3 pounds lower than when I was working out more regularly. That was prudent and paid off.
I did 1 hour on the Stair Master, intervals. Then 45 minutes on the upright bike (which I think is not great for my back but my back does worse with the recumbent bikes- not all, just the model my gym has). Then 45 minutes weight lifting, abs, stretching, and yoga.
Nice to catch up on everyone's posts and to get a good work out in