I use a machine in my apartment's gym that is similar to this: http://www.exrx.net/WeightExercises/BackGeneral/LVNarrowGripSeatedRowH.html
I've found that muscles around ** where the medium and lower trapezius are (possibly those muscles themselves) tend to tire much faster than my lats and are sore more the next days. I don't feel I'm getting a good lat workout because of this.
Any tips to use more lats and less of the muscles around that area?
If it helps at all, my goals aren't muscle building or health perse. My main goals are to get thinner and smaller in most of my body except get a V shape from wider lats and shoulders. So if I lost fat and all of my muscles got smaller except lats, maybe upper pecs, and medial/rear delts which I hope to make bigger that would be great. There are benefits to being lighter on your feet.