inactivity does not mean slothfulness. women in industrialized nations are far more likely to have inactive desk jobs than men are (just as one example). Since inactivity is defined as "less than 30 minutes of moderate-intensity activity five times a week," having too little free time might also contribute. As an example, a woman might be too caught up working her desk job and then coming home to care for children to exercise, while her husband gets to workout at the gym or play ultimate frisbee. Or it might be the case that women are sitting on their asses watching Oprah. Just saying that we have no clue simply based on that definition.