Good health has long been regarded as the most valuable goal for people to achieve , although some students rank it in third place behind relationships and study . In recent years , the concept of health has extended beyond the notion of not being sick . It has come to mean maintaining a good appearance , keeping fit , avoiding obesity and having regular medical checkups . Good health has a vital effect on relationships and study and , indeed , research shows that the healthier the student , the better his or her friendships and work are .