One of the main reasons I stopped running in my 40s was that the bouncing would occassionally cause embarrassing leakage. On my walks, it is an on and off thing for me. I suspect that my weight (20 lbs too much), meds, love of coffee and the fact that I drink a lot of water including mineral water (the fizzy stuff makes you pee faster than regular water for some reason) causes a lot of it. Since I live in a humid climate, a pad would cause a rash on my 4.5 walks but a while ago I discovered that an OB tampon catches the minor leaks effectively. I only wear them during my walks.