I read a post on here a little while ago about breaking in the springs being a myth and whether or not it is true but I coudln't find it again idk why sorry. Anyway I thought I'd just say that i do bleive they can be broken in or at least softened up a bit because when I first got my powerisers I could barely compress the springs at all unless I jumped hard on one spring (i'm in the wrong weight for springs.. bad mistake I only weigh about 135lbs and have 7090s

) anyway once my brother (significantly heavier than me) had a short go on them they seemed to bend a bit more easily and I could actually compress them more. Idk if it's bad for the springs but it certainly helped me alot as I could finally jump a little bit instead of just feeling like i was standing on top of 2 sticks. Anyway thanks for reading =).. I hope I can contribute something to this great site!
BUDA