How many times should I walk every day?

DEPENDS ON OBJECTIVE. Walking with a purpose is a beneficial activity for increasing metabolism. Generally, if one wants to be in a positive weight loss mode, one should participate in an exercise (e.g., walking) at least 4 x weekly (and eat <1400 calories per day). For example, a 200# person walking one mile in 20 minutes burns 90 calories. However, increasing your walk of one mile to 15 minutes burns 150 calories.