Can you limit the muscle disruption when replacing implants under muscle?

This is a tough question without some additional background and pictures, to know what the original breast size, implant size, and current status is. In general, if you are looking to remain about the same size and already have a pocket under the muscle, likely no additional muscle needs to be released at all. If you are looking to upsize, depending on the shape currently and where the implant needs to be positioned, i would typically transition to a dual plane technique that would also avoid any additional muscle division. Hope this helps.

Dear Anonymous4545452,
if your muscles are placed under the muscle, it is most likely that your surgeon won't need to further release pectoralis muscle. If you are considering surgery, I would suggest you consult a board-certified plastic surgeon. Only after a thorough examination, you will get more information and recommendations.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery

Unfortunately, you have not provided photographs. However, if your breasts are high on the chest wall then it is possible to place submuscular implants without cutting the inferior edge. This may require a simultaneous lift.

Best Wishes,

Gary Horndeski, M.D.

The good news is that the muscle cutting was already done and it does not need to be done again. Your recovery should be very easy, unless you have other issues you have not defined here.

Since the space has already been made, the muscles will not be cut to replace the implants. I do suggest not going larger for you might notice more muscle flexion. You still will have to give yourself time to heal before going back to Cross Fit.

I suggest you talk to your plastic surgeon or the surgeon who is going to do your procedure about implant replacement surgery.
For simple implant replacement no muscle surgery is typically done.
Generally surgeons will go through the same incision and access to the implant pocket. This is usually easy and straightforward. The dissection. Typically goes through areas of scar tissue only. Implant replacement is usually very simple compared to the primary procedure unless there is revision work being done.
Consult with a local plastic surgeon or your previous provider if you have not done so already and have them explain the process of implant exchange for you.
Best,
Mats Hagstrom, MD