<em> Why is it important to match case subjects and control subjects so closely in a case-control study?</em>
So that they have as little of differences as possible which will limit the possible factors to getting a disease.
The answer is d. none of the above. When it is cardiovascular it refers to
activities that increases one’s heart rate.
These are activities increases the amount of oxygen in our cells to burn
fat in our bodies. Examples of cardiovascular
exercises are running, biking, walking and aerobics.