Behind-the-muscle placement buys coverage and pays a small toll: implants that shift when you flex. Who notices, who cares, and the honest fix options.
Put an object under a working muscle and the muscle's contraction will move it — that's the whole phenomenon. Submuscular and dual-plane placement lay the pectoral over part of the implant to buy real benefits: thicker coverage (see the rippling article), arguably cleaner mammograms, lower contracture rates in several datasets. The toll: when the pec fires — push-up, press, carrying, an emphatic gesture — the implant beneath shifts up and out, sometimes with a visible ripple of distortion. Relax, and everything returns. It's physics you purchased, not a complication that happened to you.
At rest: nothing. In ordinary clothed life: essentially nothing. The deformity lives in flexion — gym mirrors, swimwear, intimate moments, certain professions. Surveys suggest most submuscular patients can produce some animation on demand and the majority shrug at it; the minority who mind cluster predictably: athletes and serious lifters (whose pecs fire hard and often), performers, and anyone whose distortion is at the pronounced end. This is why honest consultations ask about your training life before recommending a plane — the same anatomy gets different advice for a powerlifter and a pilates enthusiast.
Acceptance is rung zero and a real answer for mild cases — no surgery beats optional surgery. Technique tuning: in revisions, adjusting the dual-plane dissection or muscle release can soften moderate animation while keeping muscular coverage. The definitive rung — plane change: relocating the implant in front of the muscle (subfascial or subglandular) removes the mover from the equation entirely. The honest price tag: you re-enter the coverage conversation — thin-tissue patients trade animation for potential rippling and edge visibility, which is why this exchange suits patients whose tissue (or added fat grafting) can afford it. There is no free plane; there is only the trade that fits your chest and your life.
If you lift seriously, say so at consultation — it's a plane-selection fact, not small talk. If you already have animation that bothers you, photos and a short flex video via the assessment let the fix ladder be climbed on evidence. And if yours is the common subtle flicker: you're in the majority who bought good coverage at a fair mechanical price — the training guide will interest you more than any revision page.