On a little off shoot, that any imbalance in the symetry of your body shape can cause issues. For example open Canoeing on one side all the time can cause spinal problems due to larger muscles on one side so swapping the side you paddle on is a good thing. Front to back and left to right strength is supposed to be equal to help reduce hunch backs, stooping and the likes later on in life.
Id recomend to anyone to always try and work on symetry in your muscles as it might effect you later. Im not a doctor, or anything such like, but any osteopath etc will say any over developed muscle group can cause issues later on. Can also say, that i dont know of any archers complaining of issues, so we are ina fairly safe sport if ignorance an anything to go by. (if you dont know there is a problem, then there isnt one
)
but flexability is always a problem for any sportsman, As Marcus26 said.