[Paddlewise] Paddle choice and lower back pain

Hi, I live in Japan and really enjoy subscribing to this list.
I just started paddling a couple of months ago and  am beginning
  to feel lower back pains every time I go out.
At first I thought it was from carrying and putting together my kayak
but now realize its probably from the actual paddling on lakes for a 
few hours each time.
I have  a second-hand Feathercraft  Short Touring that came with a 
Nimbus Charlotte paddle.
The paddle is wooden, and I believe it's designed for day trips or short-tours.
I have decided not to try to plant the paddle as far forward as 
possible  in my stroke,  but in addition to that, I am considering 
getting a paddle that would be more forgiving on my back. Any 
recommendations concerning specific models or information about 
certain characteristics such as flex or blade shape or materials 
types  that might help would be appreciated because I am pretty much 
on my own in my new interest. Although I don't have any plans for 
extended touring would it be correct to assume getting a 
long-touring paddle would solve my back pain? Thanks in advance.
Shin Sugiyama / Nagoya, Japan

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