"Weight training can actually have positive effects on the strength of joints, muscles & tendons. In addition it can have very good effects on your circulation if done properly, and anyone will know after even a short workout with bicep-curls that their blood flood increases."

Yep.
I have already posted but just want to put emphasis on the idea that any half-educated person should know this,this stuff works.
I know I may have sound disturbing to some people sometimes with this but to avoid reliable exercise for supposed negative influences should be met with healthy skeptism unless objective research is done.