Are Subglandular Implants the best choice for my athletic body shape if I'm seeking a natural look? (photo)

I have a athletic shape, wide shoulders,75kgs, 12B, wanting to go to C/D. Apart from size, Im happy with my breasts. Surgeon said subglandular due to enough breast tissue (tissue-3cm,chest size-21cms (equilateral triangle),inter breast-1.9cm,width- both 15.3) I do weights at gym, hairdresser so use upper body daily. He said submuscular can buldge when the upper body muscles are being used.I want a natural look, and been told under the muscle is best to achieve that but surgeon said otherwise. Confused!Is subglandular implants the best for a natural look for an athletic body shape and lifestyle? Im 25, size 12, 176cms tall