Years ago while in college, I trained occasionally on a Universal weight lifting station which consisted of several different movements. I especially liked the shoulder overhead press. Mostly I lifted with 2 hands, and lowered with 1 hand, according to Arthur Jones negative-accentuated recipe. The recipe was good stuff.
However, I was younger at the time, and subsequently worked BOTH sides.
Many years later and nursing a sore shoulder, I still like negative accentuated training but train ONE side at a time to facilitate recovery…
So, I currently skip all shoulder work. I have experimented quite a bit with contra lateral eccentric training. One exceptional movement is the Nautilus Leverage shrug/row machine. I warm up with light weights.
Then, I shrug an appropriate weight with both hands and then lower with one hand. When, the eccentric component cannot be controlled, I start repping out with both hands at a 1/1 speed. The fresh arm drives the incredible burn in the contra lateral trapezius.
Faster movement speeds drive the synovial fluid into the porous cartilage tissue. Just as an inactive joint will “freeze” up, slow rep speeds by themselves do not force fluid into the cartilage to lubricate joints.
This blows the logic of isometrics being protective against joint wear and tear out of the water.