At least that is what I think it is. It hurts from the inside back elbow and up in the middle of the shoulder and the tricep itself is very sore. In the last workout of STS, I could not get my tricep to work and only afterwards realized it was hurt... I guess I'd gotten used to ignoring the dull ache of soreness and started to ignore the burning sensation that developed instead! Anyhow, I'm finding that even cardio seems to aggravate it (even when not raising my arms etc...). Mostly it hurts at night when I'm just laying in bed with a pillow propping me up (maybe it is the angle, or maybe it is just that the whole day is catching up with me.) I'm taking Advil for the pain and inflammation but would love it if I didn't have to completely rest... Maybe wishful thinking?