Hi,
I think I'm going to have to record a video but ATM I don't have any camera. Maybe some of you can help me.
So, here's what happens: Whenever I play 16ths notes above 60BPM my elbow (maybe my tricep) starts to hurt, I firstly, thought this was because of lifting but it is not; I've been an entire week without working out and it always hurts. Just a side note: I think this doesn't happen when I'm standing up, only when I'm sitting down practicing (most of the day) and my right arm feels uncomfortable.
My right arm just feels uncomfortable. For example, when I'm standing up, my right arm feels relaxed because my guitar is more distant so my arm is more stretched and relaxed but when I'm sitting down and playing, my arm has no place to "stand" so I flex my right tricep. I think that's what happens.
I know I should use my wrist when alternate picking... I only see my wrist moving but I feel tension on my right arm.
This topic describes it with a bit more depth: http://dinosaurrockguitar.com/forum/index.php?topic=2844.0