health. In many studies, people have tried to relate the difference in sickness absences directly to the double burden effect. It has been somewhat successful as women who are faced with work and child care have been known to request more sick days than men in the same situation. Additionally, working wives with children have twice the absence rate as men who are placed in the same position in work family conflicts. Loss of sleep The stress of maintaining a career and a household can also lead to a loss of sleep. In traditional gender roles it is usually the mother who is the one to get the family going in the morning as she fixes breakfast and takes the children to school before she goes to her own job. At night the mother cooks and does various other activities around the house that cause her to be the last person to retire for the night as well. Although this is merely just a few gender roles that are not set in stone, they may hold to be true. It was found that working women sleep twenty-five minutes less a night due solely to their responsibility for domestic work. Applying this statistic in larger scale leads to the assumption that women on average lose up to thirteen hours of sleep per month due to domestic duties. It can be assumed that it is possible for an average woman to lose up to one hundred and fifty-six hours of sleep during a year because of domestic work and motherly duties. Work intensity For many poor women and men whose work hours have reached the point where they cannot cut back on leisure time anymore to make time for domestic and paid work, work intensity is an issue because they often intensify their work time by doing two or more activities at once, such as taking care of children while cooking. Work intensity can lead to many negative health consequences, such as lack of sleep, stress, and lack of recreation. Economic effects There are many economic effects to the person who has to shoulder the double burden. Oftentimes, this tends to be the woman in the relationship, and so there has been analysis done on the economic effect of the double burden on women. According to Himmelweit (2002), because women often earn less than men, there is the thought that the woman