No stretching, that is what the routine says.that you can start with no stretching and keep it like that if you grow anyway. After reading a lot, stretching doesn’t convince me.why? I think it is more dangerous and you really have to be careful. After reading a lot in the internet I am not sure it is 100%safe . I also read a couple of doctors not recommending it at all,.so.I am not in a hurry.if it doesn’t work for two months, then I can think in adding it to my routine.or.doing other things.. But lets try 2 months like this and give it a go. I am not fully satisfied with my size, but not sad neither, it is not big, but not small neither (14.5 NBP) , but I am happy with it’s nice functionality and performance jejeje.so I don’t want to get any risks.