Soreness?

[Adam-R]

Ok so sometimes Ill have a bodypart thats very sore. (say triceps) so ill goto the gym and work back (since i dont want to overwork my triceps) then by then end of my back workout I notice that my tri's arent sore anymore.
why is this?

[Dertygen]

I'll assume by sore your referring to lactic acid build up and not an injury.

By working out a different muscle group you've, in essence, indirectly flushed the acid out of your triceps.

I always suggest to work the muscle group at 50-65% of your 1 rep max, with roughly 8-12 reps the day it feels sore. And just one set. That usually directly flushes them.