I'm sorry if this has been discussed before. I recently bought an AT700 in addition to my AT500. The AT700 felt kind of heavy to me and I started feeling pain in my shoulder and arm. Is this just a matter of getting used to the racquet or do I have a weak arm? Thank you.
Personal thought, i believe your shoulder is adapting to your new rackuet. Other possibility, it could be you strung more than 25lbs and it could be u r using thick string more than 0.66mm.
just adjustments. you need to strengthen your arms and shoulders though. just do pushups so your chest is strengthened aswell.