In the US only 0.5% of the commuting public bicycles to work and of that number 23% are female (US Census Bureau).
Associated with less weight gain and an inverse dose-response relationship, among women, especially those overweight and obese-similar to data for brisk walking (Lusk AC).
In a large 16 year prospective cohort study premenopausal women that spent time bicycling demonstrated a significantly lowered change in weight, and the relationship was stronger among women with excess weight (Lusk AC).