The most economic way is to use a pedometer to keep track of your daily activities. When the weather gets cold, it is easy to stay in door and cozy up to the couch. Wearing a pedomer helps us to keep an honest assessment of our daily activity and provides the necessary feedback when we are more sedentary. So wear the pedometer first thing in the morning and keep it on till bedtime. Keep track the number of steps you take throughout the first few days and add 500 steps more every week. Many authorities have recommended 10,000 steps/day to be the target. That's about 5 miles of walking/day. That may sound like a lot of walking but please remember this includes all the steps taken throughout the day even including the times you are walking between your bedroom and living room. So start walking and keep going up on the steps. Answered by: William Hsu, M.D.