We demo'ed anti-vibration gloves, a few years ago, and came to the conclusion that a good warm pair of gloves were just as good. Just as a matter of interest, what type of strimmer are you using and how long per day are you using it?
We now use Stihl FS 450, and recommend only using them for 3.5 hours per day, as we have a HAVS [hand arm vibration syndrome] points system in place.
However, most of the time, vibration is based on quality of machine, how long your nylon is, any faults with machine, using a harness, and most importantly how hard you grip the machine.
I had long-term tennis elbow from strimming up to 8 hours a day, but I found that the best cure was not to strim as long.