"I'm wondering about ...
-- my position on the bicycle while I climb.
-- my core strength... which could use some work.
-- my flexibility ... or complete and utter lack of it.
-- or whether it is something else ... like the heavy backpack I carry around during the week or my office chair."
as said it's your core strength that is telling you that it's weak. the best thing i've found for core strength is
1. kiteboarding (this is partly in jest, not many people do this)
2. deadlifts
this is not just front abs. this is side abs, strengthening your back, your chest and your lats.
once your core strength improves, climbing hills shouldn't feel painful on your back.
your position on the bike as far as i know should always be shifting so as to prevent getting stiff, esp on a particularly on a long arduous climb. moving around in your seat and moving your hand positions around is good for you...
Last edited by snow_echo_NY; 09-21-15 at 06:49 AM.