I am high-lighting this concern due to a recent incident by a friend.
He is one with the adamant belief that badminton strings should not move AT ALL after a restring and will have MAXIMUM repulsion as well as durability aka philosophy of "good, fast and cheap" in a different guise???
He made such a request to his usual stringer (not me) for tension of 24lb and that the string must not move at all during usage ... his wish came true and upon every hit of the shuttle - only goes to midcourt and sounds like he was playing with a wooden plank upon every hit😝!!!
Reason is because for the badminton string to have repulsion, it must not have been overstretched eg still able to stretch and shrink back to it's original shape - exactly like a spring. Otherwise you should request to use steel wire instead of string!
So be careful what you wish for, you may just get it😇
