Something like kayaking can cause a lot of rotational torque through your cervical and upper thoracic spine, which can impact on your brachial plexus, hence inhibiting your shoulders/arms ability to fire properly.
Can you do something like a pronated pulldown with any kind of weight? If one hand is weaker than the other you probably need to go have your neck/upper spine looked at to make sure you haven't screwed anything up.




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thank you for your advice.

