About 15 years ago I called Martin archery to see what I should do as a bow shop, leave bow strung or have the risk of damage due to twisting a limb while stringing or unstringing ?
They said they had bow strung for years without a loss of a oz of peak draw weight and most of the time if a bow had a twisted limb it was due to the customer not using a stringer and using a old method for long bows of putting your leg thru the string and then bending the limbs to string.
I would leave bow strung till after deer season and then using a stinger take the bows done for the winter months when I had very little activity.