One of the most common causes of back pain during the winter months is snow shoveling. Are you shoveling snow properly?
Improper technique: bending down at the waist to scoop the snow onto your shovel and then twisting at the trunk to throw the snow to the side.
Proper technique: pushing the snow forward and then position your body so that you are facing the spot where you want to dump the snow. Bend from the knees into a semi-lunge position to scoop the pile of snow onto your shovel and dump the snow directly ahead.