Lift with existing implants? is it plausible to do so using my existing implants, placing them sub muscular?

A breast lift is done to correct the nipple position and reduce extra skin. It sounds like the implants are filling up the extra skin. A plastic surgeon would have to look at how much extra skin is available and if your breast position meets the criteria for doing a lift. I personally would not advise using the same implants due to the size and weight.

Yes, as long as your implants are in good condition (they should be at only 3 years old), you can absolutely get a breast lift and have the implants placed under the muscle. If you would like to be seen for a consultation to go over lift options, feel free to reach out to my office. Smith Plastic Surgery 7”2-838-2455

With your very large and heavy implants, a lift will not hold and they will not fit behind the muscle. If you go down in size, the implants could be placed behind the muscle and a lift could be done that might hold.