Be VERY aware and careful. I had tendonitis in my right triceps. It nagged me, but I ignored it and started wearing a compression sleeve, when training.
I learned the hard way on Jan 5th, 2009! When doing dips (after 5 sets of incline barbell presses), on the 5th rep of my 2nd set, the tedon completely tore from my elbow. Looking back, I sure wish I had taken the 4-8 weeks of preventive therapy!