To my opinion, shutter tensionning will have no long time effect because, their springs are designed to work within their "elastic" tension range (where the deformations are totally reversible, independant of the duration of their tensionning).
However, winding/cocking just after a shot or just before (the next) depends on the camera, and on other issues than shutter spring tensionning.
For instance, with folders, you should just before shooting, and in this order :
1/ open the folder
2/ wind to next view
3/ preset exposure and cock
4/ shoot.
Especially, you should not wind to the next view before opening the folder, because :
the "wind" blowing inside it could :
a/ suck on the film (thus no longer plane) and
b/ have some dirt fly and land on the film surface
When you open the folder first, this happens with the view you have already taken, not the one you are just ready to shoot.
Paul