Jen Limits sport activity
My cup, like the previous cage, did not interfere with my sports activities. if you wear tight and slimming underwear, in order to press the belt to the body as much as possible, then the cage will find itself in a very tight space in order to loose it to the sides. But this applies to male cages, full belts for girls probably rigidly restrict movement.
I wear tight and tight men's thongs with a wide strip and a voluminous codpiece to completely cover the cup. And the only hindrance to active movement is only the feeling of the perceptible weight of this device. But in the end it doesn't matter, since he's already tucked up tight.
I also tried the dance bondage that dancers usually wear. It is just like a thong, and I found it the most comfortable for athletics. if anyone does not know what it is, you can easily find it on the Internet for the query "dance bandage"