With time, especially with running, your breasts will slowly sag. They are large enough to stretch and thin your tissue, especially with the bounce of running. Always wear a good supporting bra when you run.
Go back to your surgeon and discuss your concerns. If it is mainly loose tissue, it can be tightened with minimally invasive radiofrequency. If the fold is the issue, it can be tightened or released.
It is difficult to provide an adequate comprehensive answer without additional information such as size of implant placed, position of implant (above/below muscle), and doing a physical exam. It appears that the implants may be in a subglandular/subfascial position. I would recommend performing...
