One out of four women over 35 have weak bladders. Pregnancy and childbirth contribute to this figure, as do the many menopausal women who experience bladder weakness. However, even young girls sometimes experience leaking after strenuous exercise and smokers are also susceptible, because they cough more frequently, which can exacerbate the condition. Too much coffee, tea or alcohol doesn't help either. So, as you can see, age isn’t the only factor.