Be VERY careful about lifting anything heavy, or even lifting a small weight while twisting, while your back is knotted up. The strain your back is under can make it very susceptible to a herniated disc. Then we're talking surgery, m'boy. The old 'dawg is a surgery survivor - and I had a great surgeon and he fixed it up perfect. But, like he said, a cut back is always a cut back and I can't shovel more than a shovel of snow without cripping around like an old geezer for a week. The Mrs. Freightdawg still thinks the driveway needs to be shoveled though. Bummer.
Good luck and bend from the knees.