Considering switching from over the muscle to a partial submuscular placement.

If you work out the best placement for the implants is over the muscle.  All women with implants can have flex distortion and degree depends on the natural muscle strength.  The muscle has little influence on this.  The pocket above the muscle is closed off and is no more.  Earl Stephenson, Jr, MD, DDS

The split muscle technique (not the same as dual plane) was developed specifically for athletic patients to allow for muscle coverage over the upper part of the implant while preventing animation distortion. Animation is usually caused by the way the muscle is cut from its normal attachment to the rib cage with the usual techniques. Splitting the muscle leaves all of its attachments intact, with the portion that is normally cut left behind the central portion of the implant. It is a variation of the subfascial method.

are done routinely in most surgeon's practices.  If Dr. Baxter's 'split muscle' technique guarantees that you will not have any muscle distortion and yet still allow for coverage by muscle, then considering having that done but you should have an understanding that if you still have muscle distortion, then what?Dual plane techniques do produce distortion, some more than others with some people having minimal distortion and rarely does anyone have marked distortion as those that have submuscular placements done.  But when I do these, I advise my patients not to strengthen their chest muscles and a few of my patients have won competitions so they have learned how to get around it.  Distortion comes from any activity that contracts your pectoral muscles.If you have very little tissue and want to work out your muscles and sitting in front of me asking for advice, I would be suggesting you consider textured anatomic gel implants in your same above the muscle pocket.