how long do massages relieve muscle tension?

[Steve]

i got my muscles of my back screened the other day at a health fair and my neck muscles are labeled as really high tension, while my lower back are labeled as low tension, all of which are not in the normal range they should be in. i was curious if a good massage would help to relieve those muscle tensions and maybe correct my problem, or does a massage only provide a temporary relief (ie. a few hours)?

heres my results. on the left is the "normal" muscle tensions for your back. on the right are my test results: http://i385.photobucket.com/albums/oo296/MrSt3v3/GUDSPINE.jpg

if not a massage to help correct the problems, is there anthing else i can do? i think this is getting in the way of being able to expressively play piano