How much pressure affects recent fat grafts? And how long before vascularization?

Thanks for your question. I'm sure that brief pressure is completely harmless, and will not affect your results. The fat cells rely on neighboring capillaries to provide them with nutrients and oxygen. Slowly, they will develop their own dedicated blood supply too. That process takes a while, and that is why some of the fat transferred does not survive and goes away. You can return to your light activity within days as this is not likely to make a difference. I hope that helps a bit. Best wishes.