As much as Mary is into fitness, expanding her boobs bigger and bigger, though the weight lends to fitness, makes many of those gym exercises more difficult and some even have to be ignored when the boobies get so big that they get in the way. I remember Beshine at one time talking about the things she could no longer do at the gym. And the simple things are often no longer simple; while big boobs may make push-ups easier, think about sit-ups; like holding a weight against your chest while trying one. Like Foxy said, when she is on her back now, she is like a turtle on its back; she cannot sit up without using her arms to push her into a reclining position. But there is something so special about the girls that want to experience all these life altering huge boobie adventures, it must make them feel so good about themselves. Have to feel grateful for expanders.