Practitioners often think of yoga as a warm-up for running. Think a bit more outside of the box and use your asanas to open you up for the winter chores of shoveling, etc. Shoveling and cleaning off the cars can be tough on the back and the shoulder girdle. Take a few minutes before grabbing that shovel and ready your body for these activities. Below is a set of links to take you to asanas which can help you prepare for these outdoor chores. Of course, Sun Salutation or Surya Namaskar is a tremendous overall body tonification series to prepare, as well.
Asanas for lower back tonification
Asanas for shoulder tonification
Asanas for upper back tonification