Subglandular? (photos)

PS recommended over muscle but, she said I could go either way. For my small breasts would I need to be concerned about rippling or losing weight and not having enough tissue to cover implant if I went over. I can't seem to find much on subglandular pictures or long term results, especially for smaller breasts. If I go under will I have problems when my muscles move around with distortion of breasts? I'm getting silicone Natrelle Inspira moderate at about 330 fill. I like to workout with weights and jog.

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