Taking a hike or going for a walk duirng your lunch hour are all ways to keep fit. FitnessDoc discusses the value of a pleasant, and possible, exercise routine.
This may be a very silly question. However, I want to ask if I walk every day of the week during my lunch hour for 30 - 35 minutes at a stiff speed, is this sufficient enough for me as a 38 year old woman whose fitness level is below average? Do I need to increase the time or speed week by week, or carry on the way I do? Also would you recommend that I should put on a heart rate monitor device when walking? Any advice is much appreciated.