Re: do heavy weights really affect us?
With poor technique any rod weight can take its toll on you. I would imagine that combining poor technique with heavier weight rods would simply speed things up.
All the above can be compounded with poor conditioning.
At the very first sign of pain or troubles it probably isn't a bad idea to see a sports medical doctor to nip problems in the bud or the the very best see a sports doctor before trouble starts and prevent issues altogether.